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Symptoms » Behavioral symptoms » Glossary
 

Glossary for Behavioral symptoms

Medical terms related to Behavioral symptoms or mentioned in this section include:

  • 10q Partial Trisomy: A very rare genetic disorder characterized by the duplication of genetic material from the long arm (q) of chromosome 10 - the genetic material occurs three times in body cells instead of the normal two. The type and severity of symptoms may vary considerably depending on the exact location and size of the duplicated genetic material.
  • 11q Partial Trisomy: A very rare genetic disorder caused by a duplication of part of chromosome 11q. The characteristic symptoms of the disorder are delayed growth before and after birth, mental retardation (varying severity) and skull and facial defects. The type and severity of symptoms that can occur are variable.
  • 14q+ syndrome: A rare chromosomal disorder involving duplication of genetic material from the long arm (q) of chromosome 14 resulting in various abnormalities.
  • 18p minus syndrome: A rare chromosomal disorder where a portion of chromosome 18 is missing which is characterized by mental and growth deficiencies, drooping upper eyelid and prominent ears. The type and severity of symptoms is determined by the amount of genetic material that is missing.
  • 1q deletion: A rare chromosomal disorder where part of the long arm (q) of chromosome 1 is deleted resulting in various abnormalities which are determined by the size of the deleted portion.
  • 2-Hydroxyglutaricaciduria: A rare metabolic disorder characterized by high levels of a certain chemical (2-Hydroxyglutaric) which causes a serious progressive neurological disease and damage to the brain. The features of this disorder are variable and some cases are milder than others.
  • 2-Methylbutyric Aciduria: A very rare genetic disorder where an enzyme deficiency prevents the break down of certain proteins into energy and results in a harmful accumulation of acids in the blood and body tissues. More specifically, there is a deficiency of an enzyme (2-methylbutyryl-coenzyme A dehydrogenase) needed to convert the amino acid isoleucine into energy. 2-methylbutyrylglycine levels build up in the body and may cause damage. Symptoms vary according to the degree of enzyme deficiency - can range from asymptomatic to life-threatening.
  • 2-methylbutyryl-coenzyme A dehydrogenase deficiency: A very rare genetic disorder where an enzyme deficiency prevents the break down of certain proteins into energy and results in a harmful accumulation of acids in the blood and body tissues. More specifically, there is a deficiency of an enzyme (2-methylbutyryl-coenzyme A dehydrogenase) needed to convert the amino acid isoleucine into energy. 2-methylbutyrylglycine levels build up in the body and may cause damage. Symptoms vary according to the degree of enzyme deficiency - can range from asymptomatic to life-threatening.
  • 22q11.2 deletion syndrome: A rare genetic disorder caused by the absence of a small portion of genetic material. A small section of chromosome 22 is missing at a location called q11.2. Chromosome 22 is one of 23 pairs of chromosomes that exist in humans.
  • 2p21 deletion syndrome: This syndrome is a more severe form hypotonia-cystinuria syndrome as a larger portion of genetic material from chromosome 2p21 is deleted. It is characterized by infant seizures, reduced muscle tone, developmental delay, lactic acidosis and unusual facial appearance.
  • 2q deletion: A rare chromosomal disorder where part of the long arm (q) of chromosome 2 is deleted resulting in various abnormalities which are determined by the size of the deleted portion.
  • 3 alpha methylglutaconicaciduria, type 3: A rare genetic condition where a gene mutation prevents the production of certain protein which leads to a build-up of an acid (3-methylglutaconic acid) which can have a negative impact on the body. The condition is characterized mainly by damage to the optic nerve.
  • 3-Hydroxyacyl-CoA Dehydrogenase II Deficiency: A rare genetic disorder involving the deficiency of an enzyme (hydroxyacyl-coa dehydrogenase). The severity of the symptoms is highly variable with some cases resulting in death during the first decade while others suffer psychomotor and regression. Symptoms tend to be more severe in males who suffer progressive neurodegeneration whereas females tend to suffer mainly from developmental delay.
  • 3-methylglutaconic aciduria, type V: A rare genetic disorder where the body's cells are unable to make sufficient energy resulting in an accumulation in the body of 3-methylglutaconic acid.
  • 3C syndrome: A rare disorder characterized by cardiac malformations, cerebellar hypoplasia and cranial dysmorphism which gives the disease it's name.
  • 3q deletion: A rare chromosomal disorder where part of the long arm (q) of chromosome 3 is deleted resulting in various abnormalities which are determined by the size of the deleted portion.
  • 4-Alpha-hydroxyphenylpyruvate hydroxylase deficiency: A very rare metabolic disorder where a deficiency of a particular enzyme results in the urinary excretion of a chemical called hawkinsin. Symptoms start once the infant is weaned off breast milk.
  • 4-hydroxyphenylacetic aciduria: A urinary abnormality usually caused by the deficiency of a particular enzyme (4-hydroxyphenylpyruvic acid oxidase). The urine contains excess 4-hydroxyphenylacetic acid.
  • 46,XX chromosome 7 deletion p13: A chromosomal disorder where a small portion of chromosome 7 is deleted which results in a range of abnormalities.
  • 47 XYY syndrome: A genetic condition where males have an extra Y chromosome in each of their cells. Normally male cells have one X and one Y chromosome. This is not usually an inherited condition but a defect that occurs during cell division. Often the condition is asymptomatic.
  • 47,XXX syndrome: A genetic condition where females have an extra X chromosome in each of their cells. Normally female cells have two X chromosomes. This is not usually an inherited condition but a defect that occurs during cell division. Often the condition is asymptomatic.
  • 49,XXXXX syndrome: A rare chromosomal disorder that affects only females and involves body cells having five copies of the X chromosome instead of the normal two.
  • 49,XXXXY syndrome: A rare sex chromosome abnormality where there are three extra copies of the X chromosome.
  • 6-pyruvoyl-tetrahydropterin synthase deficiency: A rare genetic disorder where insufficient levels of tetrahydropterin leads to a build up of phenylalanine in the blood which can cause toxic side effects such as nerve damage or even brain damage. The condition does not usually cause any significant symptoms.
  • ACTH Deficiency: A rare endocrine disorder involving a lack of ACTH (adrenocorticotropic hormone) and low levels of cortisol and steroid hormones.
  • ADD: Attention Deficit Disorder (ADD) is a mental and behavioral disorder characterized by behavioral problems such as hyperactivity, inattention, concentration difficulty, and other mental symptoms. The related description Attention Deficit Hyperactivity Disorder (ADHD) may be a more modern description of the disease.

    Misdiagnosis of ADD is a well-known controversy in the sense that cases of hyperactivity in children may be over-diagnosed. There is a tendency for parents to seek and doctors to prescribe the drug Ritalin even in cases where the diagnosis of ADD or ADHD may be incorrect. Alternative diagnoses include normal child behavior (i.e. just an active child), food intolerances, or other behavioral disorders (see misdiagnosis of ADD).

    On the other hand, ADD is under-diagnosed in adults, with a large number of adults having ADD without knowing it; see misdiagnosis of Adult ADD.

  • ADHD-like symptoms: is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms include
  • ADHD-like symptoms in adults: is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms include
  • ADHD-like symptoms in children: is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms include
  • AIDS-Related Opportunistic Infections: A term given to HIV patients who have a low CD4 count (below 200) which means that they have low levels of a type of immune cell called T-cells. AIDS patients tend to develop opportunistic infections and cancers. Opportunistic infections are infections that would not normally affect a person with a healthy immune system. The HIV virus is a virus that attacks the body's immune system.
  • ATR-X syndrome: A rare X-linked disorder that affects males and is characterized by mental retardation and alpha thalassemia.
  • ATR16: A rare disorder characterized by alpha thalassemia and mental retardation.
  • Aarskog Syndrome: A rare genetic condition characterized by facial, hand, genital and growth abnormalities.
  • Abdominal Aneurysm: Dilatation of a section of the abdominal aorta, usually due to a weakness in the wall of the artery
  • Aberrant behaviour: aberrant behaviour or irregular behaviour that deviates from what is considered normal
  • Aberrant behaviour in pregnancy: Aberrant behaviour in pregnancy is a deviation from the woman's usual, expected manner or attitude.
  • Abnormal thinking: Abnormal thinking is any type of thought process that is considered deviant or outside of what is expected, usual, understandable, or typical.
  • Abnormal thinking in pregnancy: Abnormal thinking in pregnancy is a deviation from the woman's usual, expected thought processes or attitude.
  • Abrupt Mood Swings in Pregnancy: Abrupt Mood Swings in Pregnancy are the rapid change in mental state from positive to negative and back again.
  • Abrupt mood swings: is an extreme or rapid change in mood
  • Abscess: This is an area of puss collected in a cavity which is constituted by necrotised tissue
  • Absence of septum pellucidum and septo-optic dysplasia: A rare birth defect where a thin membrane in the middle of the brain is missing. This brain abnormality is never present on it's own but is a characteristic of septo-optic dysplasia where the patient also has optic disk abnormalities and pituitary deficiencies.
  • Absence of septum pellucidum with porencephalia syndrome: A rare syndrome present at birth and characterized by the absence of the thin membrane in the middle of the brain (septum pellucidum) as well as abnormal cavities in the brain (porencephaly). The syndrome also involves other structural brain abnormalities.
  • Absence seizure: An epileptic seizure involving momentary loss of consciousness.
  • Absent corpus callosum -- cataract -- immunodeficiency: A rare syndrome characterized by immunodeficiency, cleft lip or palate, cataract, reduced pigmentation and brain abnormalities.
  • Absent patellae -- scrotal hypoplasia -- renal anomalies -- facial dysmorphism -- mental retardation: A rare syndrome characterized by absent kneecaps, underdeveloped scrotum, kidney anomalies, unusual facial appearance and mental retardation.
  • Absenteeism: Loss of days or absence from school or work as a symptom
  • Absenteeism in children: Absenteeism in children refers to a state in which a child is not present as expected for a specific event, such as school.
  • Abuse dwarfism syndrome: Retarded growth, intelligence and social behavior due to child abuse. The child abuse can take the form of mental or physical cruelty or neglect.
  • Acalculia: An inability of being able to perform basic mathematical calculations
  • Acanthamoeba infection: Infection with a microscopic, free-living ameba that is readily found in the environment - soil, air and water. Most people exposed to the ameba will not become infected but when infections do occur, they tend to affect the eyes, central nervous system or can cause widespread infection throughout the body.
  • Acanthamoeba infection of the central nervous system: Infection by an amoebic organism called Acanthamoeba. Infection usually occurs when the amoeba enters through a break in the skin or through the nose. Infection can be localized or systemic where it can involve the central nervous system and cause potentially fatal meningoencephalitis. Infection of the eye can occur by cleaning contact lenses in contaminated water.
  • Acanthocytosis: A rare disorder where most of the red blood cells are abnormal with spiny projections due to lipid abnormalities. The blood abnormality is seen in conditions such as abetalipoproteinemia, severe liver disease and severe malnutrition. Symptoms and prognosis depend on the underlying disorder.
  • Acarophobia: Unfounded fear of tiny parasites or the false belief that they have infested the skin.
  • Accelerated hypertension: Accelerated hypertension is a condition characterized by a rapid increase in blood pressure. The condition is a medical emergency which can cause organ damage if not treated promptly.
  • Accutane -- Teratogenic Agent: There is strong evidence to indicate that the use of Accutane during pregnancy may cause a teratogenic effect on the fetus. A teratogen is a substance that can cause birth defects. The likelihood and severity of defects may be affected by the level of exposure and the stage of pregnancy that the exposure occurred at.
  • Aceruloplasminemia: A rare genetic disorder characterized by a lack of the protein ceruloplasmin in the blood resulting in a buildup of iron in the liver, brain and pancreas. This in turn causes diabetes and degeneration of the neural system causing tremors and walking abnormalities.
  • Achluophobia: An exaggerated or irrational fear of the night or darkness.
  • Achondroplasia: A rare disease characterized by abnormal bone growth which results in short stature with short arms and legs, large head and characteristic facial features.
  • Achrestic anemia: Achrestic anemia is a form of anemia similar to that caused by Vitamin B12 deficiency but it doesn't respond to treatment with Vitamin B12. The condition tends to progress slowly and can result in death if not treated. There are a variety of possible causes.
  • Achromatopsia: Patients who have achromatopsia (sometimes called achromatopia) do not have normal "cone vision.". Although the term may refer to acquired disorders such as color agnosia and cerebral achromatopsia, it typically refers to an autosomal recessive congenital color vision disorder, the inability to perceive color AND to achieve satisfactory visual acuity at high light levels (typically exterior daylight).
  • Acid-Base Imbalance: A disruption to the normal acid-base equilibrium in the body. There are four main groups of disorder involving an acid-base imbalance: respiratory acidosis or alkalosis and metabolic acidosis or alkalosis. Obviously the severity of symptoms is determined by the degree of imbalance.
  • Acidemia, methylmalonic: An inborn error of metabolism where amino acids in the body aren't metabolized properly resulting in high levels of the acid throughout the body.
  • Acidemia, propionic: An inherited genetic disorder where the body is incapable of processing some proteins and fats resulting in the accumulation of certain substances in the body which causes the symptoms of the condition. The condition can be life threatening.
  • Acne: Pimples and blackheads on the skin
  • Acousticophobia: An exaggerated or irrational fear of noise.
  • Acrocallosal Syndrome (Schinzel Type): A rare condition characterized by absence of portion of the brain (corpus callosum), mental deficiency, duplicated toes, mental deficiency and other abnormalities.
  • Acrocephalopolydactyly II: A rare genetic disorder characterized by head, hand and genital anomalies as well as mental retardation.
  • Acrocephalopolysyndactyly, type 2 (ACPS 2): A rare genetic disorder characterized by premature closing of skull bones, craniofacial abnormalities, heart defects, growth retardation and other disorders.
  • Acrocephalosyndactyly type 3 (ACPS 3): A rare genetic disorder characterized by premature joining of certain skull bones during development which has an impact on the shape of the head and face. Features include brachycephaly, ear deformities as well as craniofacial, finger and bone abnormalities.
  • Acrocephaly -- pulmonary stenosis -- mental retardation: A rare syndrome characterized by a pointy skull, narrowed pulmonary valve and mental retardation.
  • Acrodynia: A disease occurring in infants or young children. Symptoms include edema, pruritis, skin rash, extremities are pink, cheeks and nose are scarlet, profuse sweating, digestive disturbance, photophobia, polyneuritis, irritability, listlessness, apathy and failure to thrive.
  • Acrodysostosis: A rare genetic disorder characterized by short hands, small nose, mental deficiency and hand and foot deformities.
  • Acrofacial dysostosis Catania form: One of a group of disorders characterized by defective limb and facial development. The Catania form is very rare.
  • Acrofrontofacionasal dysostosis syndrome: A very rare syndrome characterized by abnormalities of the bones of the skeleton as well as mental retardation. Various facial, eye and urogenital anomalies are also present.
  • Acromesomelic dysplasia Hunter Thompson type: A rare genetic syndrome characterized by various severe developmental abnormalities of the skeletal bones.
  • Acropectorovertebral dysplasia: A rare inherited genetic disorder characterized by abnormalities involving the fingers, toes, palate and chest bones.
  • Acrosphenosyndactylia: A rare condition characterized by abnormalities in the appearance of the face and head as well as finger and toe abnormalities. The bones of the skull fuse together too early which prevents it from growing normally. Various toes and fingers may be fused together.
  • Act funny: the most common problem with funny acts is misdiagnosis and hence a good clinical history is of paramount importance. A reliable eye witness account is invaluable
  • Actinomycetales infection: A bacterial infection from the order of Actinobacteria. The range of symptoms is variable depending on which bacteria from the order is involved.
  • Acute Alzheimers-like concentration difficulty: maybe to due to various causative agents
  • Acute Alzheimers-like confusion symptoms: unalterable confusion state
  • Acute Alzheimers-like memory loss: also known as dementia
  • Acute Alzheimers-like symptoms: symptoms such as dementia
  • Acute Bokhoror: A brain disease caused by an unknown pathogen which is probably from the Picornavirus family of viruses. Mode of transmission is uncertain but genetic susceptibility may be involved. The incubation period appears to be an average of 15 years. The disease can be classified according to rate of progression: acute or subacute, slowly progressive and chronic. Death is common in the acute phase of the infection which can last from four days to four months.
  • Acute Chemical poisoning -- Varnish makers' and painters' Naptha: Varnish makers' and painters' Naptha is an ingredient used in certain pesticides. Exposure to the chemical can cause a range of symptoms depending on the level and route of exposure. Exposure can occur through inhalation, ingestion, the skin or eyes. Acute exposure involves a exposure over a short period of time whereas chronic exposure occurs over a longer period of time.
  • Acute Disseminated Encephalomyelitis: A type of encephalitis that usually follows an acute viral infection and involves an immune attack on myelin tissue which is part of the nervous system. Initial symptoms include fever, headache, vomiting and drowsiness followed by seizures, coma and paralysis. Often results in permanent neurological disorders.
  • Acute Pesticide poisoning -- Triforine: Triforine is an ingredient used in certain herbicides. Exposure to the chemical can cause a range of symptoms depending on the level and route of exposure. Exposure can occur through inhalation, ingestion, the skin or eyes. Acute exposure involves a exposure over a short period of time whereas chronic exposure occurs over a longer period of time.
  • Acute Pesticide poisoning -- xylene: Xylene is an ingredient used in certain insecticides. Exposure to the chemical can cause a range of symptoms depending on the level and route of exposure. Exposure can occur through inhalation, ingestion, the skin or eyes. Acute exposure involves a exposure over a short period of time whereas chronic exposure occurs over a longer period of time.
  • Acute VE: A brain disease caused by an unknown pathogen which is probably from the Picornavirus family of viruses. Mode of transmission is uncertain but genetic susceptibility may be involved. The incubation period appears to be an average of 15 years. The disease can be classified according to rate of progression: acute or subacute, slowly progressive and chronic. Death is common in the acute phase of the infection which can last from four days to four months.
  • Acute Viliuisk Encephalitis: A brain disease caused by an unknown pathogen which is probably from the Picornavirus family of viruses. Mode of transmission is uncertain but genetic susceptibility may be involved. The incubation period appears to be an average of 15 years. The disease can be classified according to rate of progression: acute or subacute, slowly progressive and chronic. Death is common in the acute phase of the infection which can last from four days to four months.
  • Acute Viliuisk Encephalomyelitis: A brain disease caused by an unknown pathogen which is probably from the Picornavirus family of viruses. Mode of transmission is uncertain but genetic susceptibility may be involved. The incubation period appears to be an average of 15 years. The disease can be classified according to rate of progression: acute or subacute, slowly progressive and chronic. Death is common in the acute phase of the infection which can last from four days to four months.
  • Acute Vilyuisk Encephalitis: A brain disease caused by an unknown pathogen which is probably from the Picornavirus family of viruses. Mode of transmission is uncertain but genetic susceptibility may be involved. The incubation period appears to be an average of 15 years. The disease can be classified according to rate of progression: acute or subacute, slowly progressive and chronic. Death is common in the acute phase of the infection which can last from four days to four months.
  • Acute Vilyuisk Encephalomyelitis: A brain disease caused by an unknown pathogen which is probably from the Picornavirus family of viruses. Mode of transmission is uncertain but genetic susceptibility may be involved. The incubation period appears to be an average of 15 years. The disease can be classified according to rate of progression: acute or subacute, slowly progressive and chronic. Death is common in the acute phase of the infection which can last from four days to four months.
  • Acute adhd-like symptoms: is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms include
  • Acute adhd-like symptoms in adults: is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms include
  • Acute adhd-like symptoms in children: is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms include
  • Acute concentration difficulty in adults: maybe to due to various causative agents
  • Acute concentration difficulty with headache-like symptoms: is mostly due to an organic cause
  • Acute difficulty concentrating at work: is mostly related to stress
  • Acute difficulty concentrating for long periods: concentrating difficulty which occurs only during particular periods
  • Acute episodes of Alzheimers-like symptoms: symptoms of Alzheimer's disease such as dementia can occur in bouts
  • Acute episodic adhd-like symptoms: ADHD is a neurodevelopmental behavioural disorder affecting 3-5% of the population characterised by 3 main components: hyperactivity, impulsivity and inattention. Some conditions which cause similar symptoms but episodic in nature include
  • Acute episodic concentration difficulty: concentrating difficulty which occurs only during particular periods
  • Acute fatty liver of pregnancy: A rare complication of pregnancy that can occur in the second half of the pregnancy. It is characterized by excessive fatty deposits in the liver which can be fatal without prompt diagnosis and treatment which involves delivering the baby as soon as possible.
  • Acute feeling of having difficulty concentrating: maybe due to stress or an underlying neurological lesion
  • Acute forgetfulness: also known as dementia
  • Acute forgetfulness in pregnancy: Acute forgetfulness in pregnancy is the tendency to have difficulty remembering details over the short term.
  • Acute fulminant multiple sclerosis: Malignant Multiple Sclerosis, is a particularly aggressive form of the disease. Thankfully very rare, this highly aggressive form is defined by its swift and relentless decline to significant disability or even death, often within a few weeks or months after the onset of the initial attack. It is characterized by widespread and progressive cerebral white matter destruction or by severe pathological involvement of clinically strategic regions such as brainstem, resulting in bulbar paralysis.
  • Acute headache: Headache, or cephalgia, is defined as diffuse pain in various parts of the head, with the pain not confined to the area of distribution of a nerve.
  • Acute hyperactivity in adults: maybe to due to various causative agents
  • Acute hyperactivity in the workplace: maybe due to stress or an underlying neurological lesion
  • Acute inattention in adults: maybe to due to various causative agents
  • Acute inattentiveness in the workplace: maybe due to stress or an underlying neurological lesion
  • Acute insomnia: Acute insomnia refers to difficulty falling asleep or staying asleep. Acute insomnia tends to be relatively short-lived when compared to chronic insomnia.
  • Acute intermittent forgetfulness: Acute intermittent forgetfulness is difficulty with remembering that occurs off and on.
  • Acute intermittent forgetfulness in pregnancy: Acute intermittent forgetfulness in pregnancy is the tendency to have difficulty remembering details over the short term.
  • Acute intermittent porphyria: A rare inherited metabolic disorder caused by a disturbed porphyrin metabolism resulting in increased production of porphyrin or its precursors. Symptoms include abdominal pain, photosensitivity and neurological disturbances such as seizures, coma, hallucinations and respiratory paralysis.
  • Acute leukaemia of ambiguous lineage: A term used to describe a type of leukemia (a blood cancer) where the leukemic cells cannot be determined as myeloid or lymphoid or where both types of cells are present.
  • Acute megacaryoblastic leukemia: A rare form of malignant bone marrow cancer involving the proliferation of immature precursors of blood cells. More specifically, it involves the rapid proliferation of megakaryoblasts (premature form of megakaryocytes).
  • Acute meningitis: Acute meningitis is an inflammation of the brain that presents in an acute fashion. The inflammation may be the result of infective agents such as bacteria, viruses and fungi as well as non-infective agents such as certain drugs. Acute forms of meningitis can develop in within hours or days whereas chronic meningitis develops over weeks or months.
  • Acute mountain sickness: A condition that occurs when an un-acclimatized person climbs to high altitudes.
  • Acute myeloblastic leukemia type 1: A form of blood cancer resulting in the rapid proliferation of immature blood cells (blast cells).
  • Acute myeloblastic leukemia type 2: A form of blood cancer resulting in the rapid proliferation of granulocytes and monocytes.
  • Acute myeloblastic leukemia type 3: A rare form of malignant bone marrow cancer involving the rapid proliferation of immature precursors of blood cells. Type 3 involves the proliferation of promyelocytes.
  • Acute myeloblastic leukemia type 4: A rare form of malignant bone marrow cancer involving the rapid proliferation of immature precursors of blood cells. Type 4 involves the rapid proliferation of myelocytes and monocytes.
  • Acute myeloblastic leukemia type 5: A rare form of malignant bone marrow cancer involving the proliferation of immature precursors of blood cells. Type 5 involves the rapid proliferation of monoblasts (immature precursors of monocytes) in particular.
  • Acute myeloblastic leukemia type 6: A rare form of malignant bone marrow cancer involving the rapid proliferation of immature precursors of blood cells. Type 6 involves the proliferation of the immature precursors of red blood cells called erythroblasts.
  • Acute myeloblastic leukemia type 7: A rare form of malignant bone marrow cancer involving the proliferation of immature precursors of blood cells. Type 7 involves the rapid proliferation of megakaryoblasts (premature form of megakaryocytes) in particular.
  • Acute myelocytic leukemia: A malignant cancer of blood-forming tissues resulting in a high number of immature leukocytes. Symptoms include soft bleeding gums, anemia, fatigue, fever, dyspnea, moderate splenomegaly, joint and bone pains and frequent infections. Also called acute granulocytic leukemia, acute myelogenous leukemia, acute nonlymphocytic leukemia, myeloid leukemia, splenomedullary leukemia, splenomyelogenous leukemia.
  • Acute myeloid leukaemia and myelodysplastic syndromes related to alkylating agent: The use of alkylating agents to treat cancer can result in leukemia in some patients.
  • Acute myeloid leukaemia and myelodysplastic syndromes related to topoisomerase type II inhibitor: The use of topoisomerase type II inhibitors to treat cancer can result in leukemia in some patients.
  • Acute myeloid leukaemia and myelodysplastic syndromes, therapy related: Certain cancer therapies can result in the development of leukemia in some patients. These therapies includes topoisomerase type II inhibitors and alkylating agents.
  • Acute myeloid leukemia: A form of rapidly progressing blood cancer resulting in the rapid proliferation of granulocytes and monocytes, red blood cells and platelets.
  • Acute myeloid leukemia, adult: A form of blood cancer resulting in the rapid proliferation of granulocytes and monocytes, red blood cells and platelets.
  • Acute non lymphoblastic leukemia: A form of rapidly progressing blood cancer resulting in the rapid proliferation of granulocytes and monocytes, red blood cells and platelets. It is one of the most common forms of leukemia in adults but can occur in children.
  • Acute seasonal concentration difficulty: concentrating difficulty which occurs only during particular periods
  • Acute stress disorder: An acute anxiety state
  • Acute vitamin A toxicity: Acute ingestion of vitamin A can cause symptoms. Symptoms usually only last for a day or two.
  • Addiction symptoms: Symptoms related to addiction (physical or mental addiction)
  • Adducted thumb syndrome recessive form: A rare recessively inherited disorder characterized mainly by a small head, arthrogryposis (joint contractures), cleft palate and various other abnormalities.
  • Adducted thumbs -- arthrogryposis, Christian type: A rare recessively inherited disorder characterized mainly by a small head, arthrogryposis (joint contractures), cleft palate and various other abnormalities.
  • Adducted thumbs Dundar type: A rare disorder characterized by a thumb abnormality as well as mental retardation, foot defects and other anomalies.
  • Adenophorea Infections: A parasitic roundworm infection. Roundworms can be found in water and soil environments as well as on plants and in animals.
  • Adenosine triphosphatase deficiency, anaemia due to: Deficiency of a chemical (adenosine triphosphate) resulting in anemia.
  • Adhd: Attention Deficit Hyperactivity Disorder (ADHD) is a mental and behavioral disorder characterized by behavioral problems such as hyperactivity, inattention, concentration difficulty, and other mental symptoms. Typically, ADHD and associated hyperactivity is known as a childhood disorder, although ADD/ADHD in adults is known to be under-diagnosed. It is distinguished from Attention Deficit Disorder (ADD) which has a reduced focus on hyperactivity type symptoms.
  • Adhesive abuse: Adhesive abuse is the use of various inhalants for the purpose of achieving a "high". They are often used as a cheap, readily available alternative to street drugs but they can cause serious damage to the body. Adhesives include household glues, rubber cement and model aeroplane glue. These adhesives can be abused by sniffing them, spraying directly into the mouth, heating them and then inhaling them or injecting them directly into the body.
  • Adhesive addiction: Adhesive addiction refers to the compulsive need to abuse adhesives (e.g. sniffing them). Sufferers have withdrawal symptoms when attempting to stop the habit and feel unable to stop the habit despite knowing the harm it is causing their health. Aerosols are very damaging to the body and can readily result permanent brain damage and even death. Death can occur through chronic use and in rare cases can occur after one session of use. Children and teenagers are particular at risk for this type of addiction - it is readily available and users feel it gains them greater acceptance from their peers. Adhesives includes household glue, rubber cement and model airplane glue.
  • Adjustment Disorder: This is a maladaptive reaction to identifiable stress
  • Adjustment problems: Adjustment problems are difficulties in coping or dealing effectively with situations.
  • Adolescent depression: It isnot unusual for young people to experience "the blues" or feel low occasionally. Adolescence is always an unsettling time, with the many physical, emotional, psychological and social changes that accompany this stage of life.
  • Adrenal Cancer: A malignant cancer that develops in the adrenal gland. The tumor may be nonfunctioning (does not produce hormones) or functioning in which case excessive levels of hormones can cause a variety of symptoms depending on which hormone is involved. Adrenal hormones made in the cortex (outer part of the gland) are aldosterone, corticosteroids and androgenic steroids. Adrenalin and noradrenalin are the hormones made in the medulla (central part of the adrenal gland).
  • Adrenal Cortex Diseases: Diseases of the adrenal cortex. Examples includes Addison's disease, Cushing's syndrome and adrenal fatigue.
  • Adrenal Cortex Neoplasms: A tumor that develops in the adrenal gland. The tumor may be nonfunctioning (does not produce hormones) or functioning in which case excessive levels of hormones can cause a variety of symptoms depending on which hormone is involved. Adrenal hormones made in the cortex (outer part of the gland) are aldosterone, corticosteroids and androgenic steroids.
  • Adrenal adenoma: collection of growths (-oma) of glandular origin.
  • Adrenal adenoma, familial: A benign tumor that develops in the adrenal gland and tends to run in families. The tumor may be nonfunctioning (does not produce hormones) or functioning in which case excessive levels of hormones can cause a variety of symptoms depending on which hormone is involved. Adrenal hormones made in the cortex (outer part of the gland) are aldosterone, corticosteroids and androgenic steroids . Adrenalin and noradrenalin are the hormones made in the medulla (central part of the adrenal gland).
  • Adrenal crisis: A potentially fatal condition where the adrenal cortex slows or stops functioning resulting in reduced glucocorticoids, decreased extracellular fluid volume and hyperkalemia. Symptoms include shock, coma, low blood pressure, weakness and loss of vasomotor tone. Also called addisonian crisis.
  • Adrenal gland hyperfunction: Excessive activity of the adrenal gland which causes excessive production of one or more adrenal hormones (aldosterone, corticosteroids, androgenic steroids, epinephrine and norepinephrine). The increased adrenal gland activity may be caused by an adrenal gland tumor or by excessive stimulation of the gland. Pituitary hormones stimulate adrenal gland activity.
  • Adrenal gland hypofunction: Reduced adrenal gland activity due to damage to the adrenal gland or lack of stimulation of the gland. Pituitary hormones stimulate adrenal gland activity.
  • Adrenal gland symptoms: Symptoms affecting the adrenal glands
  • Adrenal hyperplasia: A group of disorder that occur when there is a problem in the process of making adrenal corticosteroids.
  • Adrenal hypertension: Adrenal hypertension is high blood pressure caused by adrenal gland problems. For example, an adrenal tumor can cause excessive production of aldosterone which in turn causes salt-retention and high blood pressure. Severity of symptoms varies depending on the underlying cause.
  • Adrenal hypofunction: A condition which is characterized by a lack of production of hormones from the adrenal gland.
  • Adrenal incidentaloma: A tumor of the adrenal gland that is discovered incidentally while performing an imaging examination for reasons other than an adrenal tumor. The tumor may be asymptomatic or can causes excessive secretion of adrenal hormones and resulting symptoms. The tumor may also be malignant or benign.
  • Adrenocortical carcinoma: A condition which is characterized by malignancy which affects the adrenocortex.
  • Adrenoleukodystrophy: A rare hereditary metabolic disease that only occurs in male children and is characterized by adrenal atrophy and extensive cerebral demyelination causing progressive loss of mental functioning, aphasia, apraxia and sometimes blindness. The patient usually dies within 5 years.
  • Adrenoleukodystrophy, autosomal, neonatal form: A rare inherited disorder involving the adrenal glands, testes and certain parts of the brain (white matter). It is a less severe form of leukodystrophy where an abnormality within the body cells prevents the metabolism of certain fats (long chain fatty acids).
  • Adrenomyeloneuropathy: A form of X-linked adrenoleukodystrophy characterized by spinal cord dysfunction and brain involvement may or may not be present. Those with brain involvement suffer serious symptoms that can eventually lead to total disability and even death.
  • Adult ADD: Attention Deficit Disorder (ADD) is a mental disorder with symptoms such as hyperactivity, inattention, poor concentration, and other similar symptoms. The disorder is called "ADHD" in modern times; see more details about Adult ADHD.

    ADD can be undiagnosed into adulthood and the adult will have varying levels of dysfunction in their work, home and social lives. Affected adults have issues with as difficulting focusing on work tasks, boredom, distractedness, and so on. See symptoms of Adult ADHD.

  • Adult ADHD: Adult ADHD, (attention deficit hyperactivity disorder) is a common neurobehavioral developmental disorder with an onset in childhood that continues into adulthood. Children do not simply grow out of ADHD, as is often believed. Just the opposite is commonly true - the symptoms of ADHD often get worse as a child grows into adulthood. The predominant behaviors of adult ADHD are the same as in children and include:
    • Inattentiveness
    • Hyperactivity
    • Impulsivity

    These behaviors result in difficulties with:

    • Concentration
    • Remaining focused on a task or activity
    • Controlling behavior
    • Hyperactivity or over-activity

    The symptoms of adult ADHD can be treated, but there currently is no cure for the disorder. Most people with ADHD can be successfully treated and lead normal, productive lives at home, work, school and with friends and family. The cause or causes of ADHD are not yet known, although researchers believe that genes may be one factor in the development of the disease. It is most likely that the disorder is the result of a combination of elements, including environmental factors, traumatic head injuries, nutrition, and social influences.

  • Adult Panic-Anxiety Syndrome: A psychiatric disorder involving anxiety and panic attacks that occur for no obvious reason.
  • Adult Polyglucosan Body Disease: A condition which is a glycogen storage disease causing hepatosplenomegaly and failure to thrive
  • Adverse reaction to chemical -- 1-Propanol: 1-Propanol is a chemical used in various antiseptics, polishes, cleaners, cosmetics and lacquer. Some people can suffer an adverse reaction to the chemical which mainly involves irritation to the part of the body exposed to the chemical - eyes, skin and gastrointestinal. The severity of symptoms varies amongst patients.
  • Aelurophobia: An exaggerated or irrational fear of cats.
  • Aerophobia: An exaggerated or irrational fear of fresh air, breezes and flying.
  • Aerosol abuse: Aerosol abuse is the use of various inhalants for the purpose of achieving a "high". They are often used as a cheap, readily available alternative to street drugs but they can cause serious damage to the body. Aerosols include air fresheners, hair spray, spray pain and deodorants. These aerosols can be abused by sniffing them, spraying directly into the mouth, heating them and then inhaling them or injecting them directly into the body.
  • Aerosol addiction: Aerosol addiction refers to the compulsive need to abuse aerosol (e.g. sniffing them). Sufferers have withdrawal symptoms when attempting to stop the habit and feel unable to stop the habit despite knowing the harm it is causing their health. Aerosols are very damaging to the body and can readily result permanent brain damage and even death. Death can occur through chronic use and in rare cases can occur after one session of use. Children and teenagers are particular at risk for this type of addiction - it is readily available and users feel it gains them greater acceptance from their peers. Aerosols includes spray pain, air freshener, deodorants and hair sprays.
  • Affective Disorders, Psychotic: A mental disorder involving mood disturbance and psychotic symptoms.
  • African Sleeping sickness: A disease caused by parasites (Trypanosome brucei gamiense or T. brucei rodesiense) and transmitted to humans by the tsetse fly which is found only in Africa. Causes symptoms such as fever, chills, headache, anemia, edema of hands and feet, enlarged lymph glands, lethargy, sleepiness, convulsions and coma. Also called African trypanosomiasis and sleeping sickness.
  • Agenesis of the corpus callosum: Congenital absence of connective part of the brain.
  • Agenesis of the corpus callosum -- mental retardation -- coloboma -- micrognathia: A rare inherited disorder characterized by mental retardation, coloboma, small jaw and a brain anomaly.
  • Aggression: Overly aggressive behavior.
  • Aging: The medical conditions from getting older.
  • Aging brain syndrome: Aging processes in the brain can cause various psychological and neurological symptoms.
  • Agitation: A state of increased tension with episodes of emotional and physical irritability.
  • Agnosia: is a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is there any significant memory loss
  • Agnosia in children: Agnosia in children is a condition in which a child is unable to recognize and identify objects or persons.
  • Agoraphobia: This is an irrational fear of being in public that sometimes is associated with panic attacks
  • Aguecheek disease: Patients with liver disease who develop symptoms of dementia after eating lots of protein (meat has a high protein level) due to an intolerance to the nitrogenous compounds in the protein.
  • Agyria pachygyria polymicrogyria: A very rare disorder characterized by abnormal brain development.
  • Agyria-pachygyria type 1: Abnormal brain development where the brain fails to develop normally during the fetal stage.
  • Agyrophobia: An exaggerated or irrational fear of crossing roads. It includes a fear of being attacked on the street or being unable to defend oneself while crossing the road.
  • Aicardi syndrome: A rare genetic disorder where the structure connecting the two halves of the brain fails to develop which results in seizures and eye abnormalities .
  • Aicardi-Goutieres syndrome: A rare inherited progressive disease that affects the brain and immune system.
  • Aicardi-Goutieres syndrome 1: A rare inherited progressive disease that affects the brain and immune system. Type 1 is caused by a defect on chromosome 3p21.3-p21.2.
  • Aicardi-Goutieres syndrome 2: A rare inherited progressive disease that affects the brain and immune system. Type 2 is caused by a defect on chromosome 13q14-q21.
  • Aicardi-Goutieres syndrome 3: A rare inherited progressive disease that affects the brain and immune system. Type 3 is caused by a defect on chromosome 11q13.2.
  • Aicardi-Goutieres syndrome 4: A rare inherited progressive disease that affects the brain and immune system. Type 4 is caused by a defect on chromosome 19p13.13.
  • Aicardi-Goutieres syndrome 5: A rare inherited progressive disease that affects the brain and immune system. Type 5 is caused by a defect on chromosome 3p21.3-p21.2.
  • Aichmophobia: An exaggerated or irrational fear of pointy objects or needles.
  • Air embolism: A condition where an air bubble enters the cardiovascular system (via injection, intravenous therapy, surgery or puncture wound) and obstructs the blood flow.
  • Airway obstruction: airway obstruction is a blockage of the upper airway, which can be in the trachea, laryngeal (voice box), or pharyngeal (throat) areas or involve the bronch.
  • Akathisia: A condition characterized by a constant urge to move resulting in the sufferer being unable to sit still. Can be caused by use of anti-psychotic drugs or anti-depressants or can occur spontaneously.
  • Akesson syndrome: A very rare syndrome characterized by excessive skin folds and furrows on the scalp, mental retardation the failure of the thyroid to develop.
  • Al Gazali Aziz Salem syndrome: A rare syndrome characterized mainly by heart disease, short stature and a webbed neck.
  • Al Gazali Sabrinathan Nair syndrome: A very rare syndrome characterized by bone and eye problems, seizures and mental retardation.
  • Al Murrah-induced lead poisoning: Al Murrah is a folk remedy used mainly by Saudi Arabian people to treat problems such as stomach pain, diarrhea and colic. This folk remedy has the potential to cause lead poisoning due to its relatively high content of lead. Children are more susceptible to the effects of lead. The use of folk remedies is still prevalent in some cultures. Lead poisoning can result in serious illness and even death in severe cases.
  • Alagille syndrome: A genetic disorder affecting the liver and characterized by the absence of some or all of the liver bile ducts that transport bile within the liver.
  • Alarcon-induced lead poisoning: Alarcon is a folk remedy used mainly by Mexican people to treat digestive or stomach problems including indigestion and diarrhea. This folk remedy has the potential to cause lead poisoning due to its relatively high content of lead. Children are more susceptible to the effects of lead. The use of folk remedies is still prevalent in some cultures. Lead poisoning can result in serious illness and even death in severe cases.
  • Albayaidle-induced lead poisoning: Albayaidle is a folk remedy used mainly by Mexican and Central American people to treat digestive or stomach problems such as vomiting and colic. It is also used to treat apathy and lethargy. This folk remedy has the potential to cause lead poisoning due to its relatively high content of lead. Children are more susceptible to the effects of lead. The use of folk remedies is still prevalent in some cultures. Lead poisoning can result in serious illness and even death in severe cases.
  • Albayalde-induced lead poisoning: Albayalde is a folk remedy used mainly by Mexican and Central American people to treat digestive or stomach problems such as vomiting and colic. It is also used to treat apathy and lethargy. This folk remedy has the potential to cause lead poisoning due to its relatively high content of lead. Children are more susceptible to the effects of lead. The use of folk remedies is still prevalent in some cultures. Lead poisoning can result in serious illness and even death in severe cases.
  • Albers-Schonberg disease -- malignant recessive form: A rare disorder characterized primarily by increased bone density as old bone is not resorbed and replaced with new bone - is also known as marble bone disease. The malignant infantile form is the most severe form of this disorder and death usually occurs in the first decade of life.
  • Albright's hereditary osteodystrophy: A rare genetic disorder where the body fails to recognize and respond to the parathyroid hormone. The parathyroid hormone is involved in controlling the blood levels of calcium and phosphate.
  • Alcohol Withdrawal: Symptoms that occur when alcohol consumption is discontinued or reduced. Symptoms may vary depending on the level of dependence.
  • Alcohol abuse: Excessive alcohol as a symptom of other conditions
  • Alcohol drinking: The consumption of a drink containing alcohol. Alcohol consumption can cause varying degrees of impairment depending on the amount consumed. Consuming very large amounts of alcohol can lead to death.
  • Alcohol intoxication: excess intake of alcohol can lead to serious consequences
  • Alcohol use: Use of alcohol (as a symptom)
  • Alcohol-Induced Disorders: Disorders caused by excessive alcohol consumption. The symptoms are variable depending on the disorder involved. Some of the disorders are: alcohol abuse, alcohol dependence, alcohol intoxication, alcohol withdrawal, alcohol intoxication delirium, alcohol withdrawal delirium, alcohol-induced persisting dementia, alcohol-induced persisting amnestic disorder, alcohol-induced psychotic disorder, alcohol-induced mood disorder, alcohol-induced anxiety disorder, alcohol-induced sexual dysfunction, alcohol-induced sleep disorder, liver damage, liver cancer and esophageal cancer.
  • Alcohol-induced hypertension: Alcohol-induced hypertension is high blood pressure caused by excessive drinking of alcohol.
  • Alcohol-induced pseudo-Cushing syndrome: The excessive consumption of alcohol can result in symptoms similar to a condition called Cushing's syndrome. When alcohol consumption is stopped, symptoms regress.
  • Alcoholic Neuropathy: Neurological changes due to nerve damage from long-term alcohol consumption
  • Alcoholic intoxication: The excessive consumption of alcohol can have toxic effects on the body and can ultimately result in death in severe cases.
  • Aldred syndrome: A rare disorder characterized by the presence of mental retardation and retinitis pigmentosa the starts earlier than normal. Female carriers tend to have only vision symptoms without mental retardation.
  • Alektorophobia: An exaggerated or irrational fear of chickens.
  • Alertness: A state of function in which someone is watchfull
  • Alexander Syndrome: Brain myelin disorder causing mental degeneration.
  • Algophobia: An anxiety disorder where the sufferer is fearful of experiencing pain or seeing others experiencing it.
  • Alkalosis: A condition that iscaused by the accumulation of base in the body.
  • Allan-Herndon-Dudley Syndrome: A very rare inherited disorder characterized primarilty by mental retardation.
  • Allergic asthma: A form of asthma caused by inhalation of airborne allergenic substance.
  • Allergic encephalomyelitis: An autoimmune brain and spinal cord disease that can be induced in laboratory animals in experimental settings. The disease involves inflammation and degeneration of nerve myelin sheaths and it may be acute or chronic.
  • Allergic irritability syndrome: Symptoms such as irritability and poor concentration associated with nose, ear and sinus symptoms caused by allergies such as hayfever.
  • Allergic tension-fatigue syndrome: Variable symptoms caused by food allergy.
  • Alopecia mental retardation hypogonadism: A rare syndrome characterized by mental retardation, abnormal gonad functioning and a total lack of hair at birth. After childhood, sparse hair growth may occur.
  • Alopecia mental retardation syndrome: A rare syndrome characterized primarily by a lack of hair and mental retardation.
  • Alopecia, epilepsy, oligophrenia syndrome of Moynahan: A rare condition characterized by alopecia, epilepsy, mental retardation and a small head.
  • Alopecia, epilepsy, pyorrhea, mental subnormality: A rare syndrome characterized by alopecia, epilepsy, mental retardation and pus-producing gum and tooth inflammations.
  • Alopecia, mental retardation and neurological problems: A rare, newly described syndrome characterized by baldness, mental retardation and neurological problems.
  • Alopecia-contractures-dwarfism-mental retardation: A rare syndrome characterized primarily by mental retardation, short stature, lack of hair and contractures.
  • Alpers Syndrome: A rare syndrome characterized by liver disease, seizures and progressive, episodic psychomotor retardation.
  • Alpha thalassemia: Thalassemia is an inherited blood disorder characterized by abnormal synthesis of hemoglobin. Hemoglobin consists of two main protein chains called alpha and beta. Alpha thalassemia involves defects in one or more of the four genes required to make each ? protein chain. The main symptom is anemia, the severity of which can vary amongst patients depending on how many defective genes are involved.
  • Alpha thalassemia -- Hemoglobin H disease: Thalassemia is an inherited blood disorder characterized by abnormal synthesis of hemoglobin. Hemoglobin consists of two main protein chains called alpha and beta. Hemoglobin H disease involves defects in three of the four genes required to make each ? protein chain. The main symptom is moderate to severe anemia.
  • Alpha thalassemia major: Thalassemia is an inherited blood disorder characterized by abnormal synthesis of hemoglobin. Hemoglobin consists of two main protein chains called alpha and beta. Alpha thalassemia major is very rare involves defects in all of the four genes required to make each ? protein chain. The condition leads to infant death before or soon after birth.
  • Alpha-Mannosidosis: A rare condition which is characterized by a lysosomal storage defect.
  • Alpha-ketoglutarate dehydrogenase deficiency: A metabolic disorder characterized by a deficiency of Alpha-ketoglutarate dehydrogenase which results in high levels of oxoglutaric acid in the urine as well as other severe symptoms.
  • Alpha-mannosidosis type II: A rare inherited metabolic disorder involving a deficiency of an enzyme (alpha-mannosidosase) which results in the accumulation of certain chemicals in the body which leads to progressive damage. This form of the condition is less severe than type I (infantile form).
  • Alpha-mannosidosis, adult-onset form:
  • Alpine syndrome: A condition that occurs in some people who go to low altitude winter resorts (1500 metres). It tends to mostly affect people who have been fasting when they arrive.
  • Alport Syndrome: A rare hereditary disorder involving the progressive deterioration of parts of the kidney resulting in chronic kidney disease.
  • Alport syndrome -- mental retardation -- midface hypoplasia -- elliptocytosis: A rare syndrome characterized by the association of Alport syndrome, mental retardation, underdeveloped midface and a blood abnormality (elliptocytosis). Alport syndrome is an inherited condition involving progressive kidney damage and hearing loss.
  • Altered mental state: A change in the normal mental state of a person.
  • Altered mental status: linked to confusion, delirium, obtundation, stupor, and coma
  • Alternating Hemiplegia: Episodes of one-sided paralysis.
  • Aluminium poisoning: A type of heavy metal poisoning caused by excessive exposure to aluminium.
  • Aluminium toxicity: High body levels of aluminium resulting in symptoms. Usually occurs in patients with renal impairment.
  • Alzheimer disease 10: An inherited form of Alzheimer's. Type 10 is caused by a genetic defect on chromosome 10p13.
  • Alzheimer disease 12: An inherited form of Alzheimer's. Type 12 is caused by a genetic defect on chromosome 8p12-q22.
  • Alzheimer disease 13: An inherited form of Alzheimer's disease that is linked to a defect on chromosome 1q21. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease 14: An inherited form of Alzheimer's disease that is linked to a defect on chromosome 1q25. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease 15: An inherited form of Alzheimer's disease that is linked to a defect on chromosome 3q22-q24. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease 16: Alzheimer disease 16 (late-onset) is a form of Alzheimer's disease that is linked to a defect on chromosome Xq21.3. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease 2, late-onset: Alzheimer disease 2 (late-onset) is a form of Alzheimer's disease that is linked to a defect on chromosome 19q13.2. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease 3, (early-onset Alzheimer disease): Alzheimer disease 3 is an early-onset form of Alzheimer's disease that is linked to a defect on chromosome 14q24.3. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease 5: An inherited form of Alzheimer's. Type 5 has a late onset and is caused by a genetic defect on chromosome 12p11.
  • Alzheimer disease 6: A genetic form of Alzheimer's. Type 6 has a late onset and is caused by a genetic defect on chromosome 10q24.
  • Alzheimer disease 7: An inherited form of Alzheimer's. Type 7 is caused by a genetic defect on chromosome 10p13.
  • Alzheimer disease 8: An inherited form of Alzheimer's. Type 8 is caused by a genetic defect on chromosome 20p.
  • Alzheimer disease 9: A genetic form of Alzheimer's. Type 9 has a late onset and is caused by a genetic defect on chromosome 19p13.2.
  • Alzheimer disease type 1: A degenerative brain disease characterized primarily by progressive dementia. Type 1 has an early onset (starts before the age of 65). It is caused by mutations in the APP gene which results in the production of a toxic protein (amyloid beta peptide) in the brain which collects into clumps (amyloid plaques) in the brain. These plaques cause damage to nerve cells in the brain.
  • Alzheimer disease type 2: A degenerative brain disease characterized primarily by progressive dementia. Type 2 has a late onset - starts after the age of 65. It is believed to be caused by a combination of genetic mutations and environmental and lifestyle factors. The condition occurs when there is excessive production of a toxic protein (amyloid beta peptide) in the brain which collects into clumps (amyloid plaques) in the brain. These plaques cause damage to nerve cells in the brain.
  • Alzheimer disease type 4: A degenerative brain disease characterized primarily by progressive dementia. Type 4 has an early onset (starts before the age of 65). It is caused by mutations in the PSEN2 gene which results in the production of a toxic protein (amyloid beta peptide) in the brain which collects into clumps (amyloid plaques) in the brain. These plaques cause damage to nerve cells in the brain.
  • Alzheimer disease, early-onset, with cerebral amyloid angiopathy: An early-onset form of Alzheimer's disease that is linked to a defect on chromosome 21q21. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease, familial: A degenerative brain disease characterized primarily by progressive dementia. The familial form is very rare and is completely inherited and has an early onset (usually in the 4th decade). It occurs when there is excessive production of a toxic protein (amyloid beta peptide) in the brain which collects into clumps (amyloid plaques) in the brain. These plaques cause damage to nerve cells in the brain.
  • Alzheimer disease, familial, 1: An inherited form of Alzheimer's disease that is linked to a defect on chromosome 21q. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease, familial, 11: An inherited form of Alzheimer's disease that is linked to a defect on chromosome 9p22.1. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease, familial, 3, with spastic paraparesis and apraxia: This form of Alzheimer's is an early-onset form of Alzheimer's that is linked to a defect on chromosome 14q24.3. It is characterized by features which are atypical for Alzheimer's - spastic paraparesis which occurs before the dementia symptoms and apraxia. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease, familial, 3, with spastic paraparesis and unusual plaques: This form of Alzheimer's is an early-onset form of Alzheimer's that is linked to a defect on chromosome 14q24.3. It is characterized by features which are atypical for Alzheimer's - spastic paraparesis which occurs before the dementia symptoms and unusual plaques in the brain. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease, familial, 4: An inherited form of Alzheimer's disease that is linked to a defect on chromosome 1q31-q42. Alzheimer's disease is a progressive disorder involving degeneration of the brain. The disease mainly affects brain functions involving thinking, memory, personality and behaviour.
  • Alzheimer disease, familial, type 3: A degenerative brain disease characterized primarily by progressive dementia. Type 3 has an early onset (starts before the age of 65). It is caused by mutations in the PSEN1 gene which results in the production of a toxic protein (amyloid beta peptide) in the brain which collects into clumps (amyloid plaques) in the brain. These plaques cause damage to nerve cells in the brain.
  • Alzheimer's disease: A progressive degenerative disease of the brain of unknown cause
  • Alzheimer's disease without Neurofibrillary tangles: A form of Alzheimer's that involves only plaques and no neurofibrillary tangles. This form tends to have an older age of onset and death and a shorter disease duration.
  • Alzheimer's-like symptoms: symptoms such as dementia
  • Alzheimers-like concentration difficulty: maybe to due to various causative agents
  • Alzheimers-like confusion symptoms: unalterable confusion state
  • Alzheimers-like memory loss: also known as dementia
  • Amanita polypyramis poisoning: Amanita polypyramis is a type of large-capped mushroom often found growing in the wild in the US. The mushroom tends to give off a chlorine-like odor. It is poisonous and death can result if sufficient quantities are eaten.
  • Amathophobia: An exaggerated or irrational fear of dust.
  • Amaxophobia: An exaggerated or irrational fear of riding in a vehicle or being in one.
  • Ambien overdose: Ambien is a prescription drug mainly used to treat insomnia. Excessive doses of the drug can result in various symptoms and even death in severe cases.
  • Ambien withdrawal: Symptoms that occur when Ambien (Zolpidem) use is discontinued or reduced. Ambien is a sedative hypnotic drug. Symptoms may vary depending on the level of dependence.
  • Amelo-cerebro-hypohidrotic syndrome: A rare syndrome involving degeneration of the central nervous system, seizures and abnormal tooth development.
  • Aminoacidopathies: Any of a group of inborn errors of metabolism which results in the build up in the body of one or more amino acids in the blood and/or urine. The range and severity of symptoms is hugely variable.
  • Amish brittle hair syndrome: A rare inherited condition characterized by brittle hair, mental and physical impairment, decreased fertility and short stature.
  • Amitriptyline toxicity: The toxic reaction of the body to the substance, possibly via allergic reaction or overdose.
  • Amnesia: A disorder in which the ability to store and recall new information, as well as past information may be lost.
  • Amnesic shellfish poisoning: Rare shellfish poisoning sometimes causing amnesia.
  • Amotivational syndrome: An impaired desire to engage in normal social activities and situations due to external factors such as relationships, substance or events.
  • Amoxapine toxicity: The toxic reaction of the body to the substance, possibly via allergic reaction or overdose.
  • Amphetamine abuse: Use of the stimulant drugs known as amphetamines or "speed"
  • Amphetamine withdrawal: Symptoms that occur when amphetamine use is discontinued or reduced. Symptoms may vary depending on the level of dependence. Amphetamines include dexamphetamine (speed), Ritalin and MDMA (ecstasy).
  • Amphetamine-induced hypertension: Amphetamine-induced hypertension is high blood pressure caused by use of amphetamines. Patients with an existing history of hypertension may suffer further blood pressure increases while taking amphetamines and this can be serious. Severity of symptoms varies amongst patients depending on their susceptibility, underlying health and duration of amphetamine use.
  • Ampola syndrome: A rare genetic disease characterized primarily by mental retardation, facial anomalies, short stature, seizures and finger and toe abnormalities.
  • Amychophobia: An exaggerated or irrational fear of being scratched or clawed.
  • Amyloid angiopathy: A blood vessel disorder caused by abnormal amyloid deposits in the blood vessel walls of the brain. The deposits can cause the blood vessel to become weak and rupture resulting in intracranial bleeding. Despite the potentially serious consequences the disorder is often asymptomatic until old age.
  • Amyloidosis VI: Amyloidosis involves the abnormal deposit of a substance called amyloid in various parts of the body. In the Icelandic type, the amyloid deposits affect the brain blood vessels and cause hemorrhages.
  • Amyloidosis VII: Amyloidosis involves the abnormal deposit of a substance called amyloid in various parts of the body. In the Ohio type, the amyloid deposits in the leptomeningeal blood vessels, brainstem, spinal cord and eye causing central nervous system dysfunction, brain hemorrhages as well as vision impairment.
  • Amyloidosis of gingiva and conjunctiva mental retardation: A rare disorder characterized by mental retardation and abnormal amyloid deposits in the gums and conjunctiva of the eye.
  • Amyloidosis, oculoleptomeningeal: Amyloidosis involves the abnormal deposit of a substance called amyloid in various parts of the body. In this particular type, the amyloid deposits in the leptomeningeal blood vessels, brainstem, spinal cord and eye causing central nervous system dysfunction, brain hemorrhages and vision impairment.
  • Anaemia, sideroblastic, X-linked -- ataxia: A very rare inherited disorder characterized by mild anemia and early onset neurological motor symptoms. The neurological symptoms tend to be relatively stable or slowly progressive with only occasional dependence on crutches or wheelchairs.
  • Anauxetic dysplasia: A rare disorder characterized by abnormal skeletal and spinal development.
  • Andropause: A symptomatic decline in male androgens that may occur as men age.
  • Androphobia: An exaggerated or irrational fear of men
  • Anemia: Reduced red blood cells in the blood
  • Anemia of pregnancy: Anemia of pregnancy is anemia that occurs during pregnancy. Women's bodies have a greater demand for iron during pregnancy and if intake is not sufficient, anemia can result. Anemia in pregnant women can lead to infant problems such as premature birth, fetal death, retarded growth and other problems.
  • Anemia, Iron-Deficiency: A lack of fully functioning red blood cells due to a deficiency of iron. The iron allows the body to make hemoglobin in red blood cells which in turn allows the red blood cell to carry oxygen.
  • Anemia, Refractory, with Excess of Blasts: A bone marrow disease which results in insufficient red blood cells in the blood (anemia). The prognosis is poor with death usually occurring within a couple of years. There are two types: type 1 refers to cases where the level of blasts is less than 10% and type 2 refers to cases where the level of blasts is 10-20%. When too many immature blood cells (blasts) are produced by the bone marrow, the condition may progress to acute myeloid leukemia - occurs in about a quarter of cases in type 1 and a third of cases in type 2.
  • Anemia, Refractory, with Excess of Blasts, type 1: A bone marrow disease which results in insufficient red blood cells in the blood (anemia). The prognosis is poor with death usually occurring within a couple of years. Type 1 refers to cases where the level of blasts is less than 10% and type 2 refers to cases where the level of blasts is 10-20%. When too many immature blood cells (blasts) are produced by the bone marrow, the condition may progress to acute myeloid leukemia - occurs in about a quarter of cases in type 1.
  • Anemia, Refractory, with Excess of Blasts, type 2: A bone marrow disease which results in insufficient red blood cells in the blood (anemia). The prognosis is poor with death usually occurring within a couple of years. Type 1 refers to cases where the level of blasts is less than 10% and type 2 refers to cases where the level of blasts is 10-20%. When too many immature blood cells (blasts) are produced by the bone marrow, the condition may progress to acute myeloid leukemia - occurs in about a third of cases in type 2.
  • Anemia, hypochromic microcytic: A blood disorder where red blood cells are too small and lack sufficient iron. It can be inherited or caused by insufficient iron in the diet or from a genetic disorder.
  • Anemic -- hematuria syndrome: An epidemic disease in Argentina which has a prolonged recovery time but usually there are no complications. Symptoms vary between seasons so that affected patients suffer anorexia, vomiting, diarrhea and dehydration in summer but suffer reduced urination, excess blood, albumin and renal casts in the urine. Other symptoms occur irrespective of the season.
  • Aneurysm, intracranial berry: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms.
  • Aneurysm, intracranial berry, 1: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 1 is caused by a defect on chromosome 7q11.2.
  • Aneurysm, intracranial berry, 10: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 10 is caused by a defect on chromosome 8q12.1.
  • Aneurysm, intracranial berry, 2: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 2 is caused by a defect on chromosome 19q13.
  • Aneurysm, intracranial berry, 3: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 3 is caused by a defect on chromosome 1p36.13-p34.3.
  • Aneurysm, intracranial berry, 4: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 4 is caused by a defect on chromosome 5p15.2-14.3.
  • Aneurysm, intracranial berry, 5: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 5 is caused by a defect on chromosome 2p13.
  • Aneurysm, intracranial berry, 6: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are now six different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases an individuals risk for developing intracranial berry aneurysms. Type 6 is caused by a defect on chromosome 9p21.
  • Aneurysm, intracranial berry, 7: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 7 is caused by a defect on chromosome 11q24-q25.
  • Aneurysm, intracranial berry, 8: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 8 is caused by a defect on chromosome 14q23.
  • Aneurysm, intracranial berry, 9: A bulge in a blood vessel in the brain. The bulge can rupture causing a stroke. They usually form as a result of high blood pressure and weak blood vessel walls in the brain. There are five different subtypes of intracranial berry aneurysms with each one caused by a defect in different gene. The defective gene increases and individuals risk for developing intracranial berry aneurysms. Type 9 is caused by a defect on chromosome 2q33.1.
  • Angelman syndrome: A rare genetic disorder characterized by a puppet-like gait, fits of laughter and characteristic facial features.
  • Angelman-Like Syndrome, X-linked: A very rare syndrome characterized mainly by mental retardation, mutism, facial anomalies, epilepsy and weak eye muscles. Males tended to have severe mental retardation whereas female carriers had mild or no mental retardation. Patients do eventually walk but then often lose this ability by the age of 10 years. Female carriers tend to have mild symptoms and males have severe symptoms - symptoms are variable to some degree.
  • Anger: A strong feeling of displeasure and aggrevation
  • Angina pectoris: severe chest pain due to ischemia
  • Anginophobia: An exaggerated or irrational fear of angina, choking or narrowness of the throat.
  • Angiokeratoma -- mental retardation -- coarse face: A rare inherited genetic syndrome characterized by mental retardation, coarse facial features and capillary hemangiomas.
  • Anglophobia: An exaggerated or irrational fear of England or the English.
  • Aniridia -- mental retardation syndrome: A very rare syndrome characterized by mental retardation and absent irises.
  • Aniridia -- ptosis -- mental retardation -- obesity, familial: A rare familial disorder characterized by eye abnormalities, mental retardation and obesity.
  • Aniridia -- renal agenesis -- psychomotor retardation: A rare genetic disorder characterized by missing irises of the eye, kidney developmental problems and mental retardation.
  • Aniridia III: A genetic disorder where part or all of the iris of one or both eyes is missing. The iris is the colored part of the eye. There are four forms of the disease: AN-1, AN-II, AN-III and AN-IV. AN-III is associated with mental retardation.
  • Aniridia cerebellar ataxia mental deficiency: A rare inherited disorder characterized by a partial absence of the iris, mental retardation and impaired coordination of voluntary movements.
  • Aniridia ptosis mental retardation obesity familial type: A rare familial disorder characterized by eye abnormalities, mental retardation and obesity.
  • Ankylophobia: An exaggerated or irrational fear of stiff or immobile joints.
  • Anophthalmia -- hand and foot defects -- mental retardation: A rare syndrome characterized mainly by mental retardation, hand and foot defects and absent eyes.
  • Anophthalmia -- heart and pulmonary anomalies -- intellectual deficit: A rare disorder characterized by absent eyes, heart and lung anomalies and mental retardation.
  • Anophthalmia -- hypothalamo-pituitary insufficiency: A rare syndrome characterized mainly by small or absent eyes and malformations of the hypothalamus and pituitary gland.
  • Anophthalmia -- hypyothalamo-pituitary insufficiency: A rare syndrome characterized mainly by small or absent eyes and malformations of the hypothalamus and pituitary gland.
  • Anophthalmos with limb anomalies: A rare disorder characterized by absent eyes
  • Anorexia Nervosa: A disorder where a distorted sense of body image leads to self-starvation to the point of death in some cases.
  • Anorexia nervosa, genetic types: There is mounting evidence that anorexia nervosa may be caused by genetic factors which when combined with psychosocial factors can increase a persons risk of developing the condition.
  • Anoxemia: Lack of oxygen in the blood.
  • Anoxia: A condition marked by a lack of oxygen.
  • Ansell-Bywaters-Elderking syndrome: A rare familial syndrome characterized mainly by mental retardation, rash, eye inflammation and joint disease.
  • Anthophobia: An exaggerated or irrational fear of flowers.
  • Anthropophobia: An exaggerated or irrational fear of people and groups of people.
  • Anti-Social Personality Disorder: A psychiatric condition characterized by chronic behavioral and social problems which often involves criminal behaviour.
  • Anti-social personalities: A group of psychological condition which are characterized by anti-social behaviour
  • Anticholinergic syndrome: Symptoms caused by overdose of anticholinergic drugs.
  • Antlophobia: An exaggerated or irrational fear of floods.
  • Anton-Vogt syndrome: A congenital disorder where a brain anomaly results in involuntary purposeless movements (choreathetosis). Excitement and activity can make symptoms worse.
  • Anxiety: Excessive worry, anxiety, or fear.
  • Anxiety disorder: A mental condition that is characterized by anxiety and avoidance behaviours
  • Anxiety disorder in pregnancy: Anxiety disorder in pregnancy causes a feeling of distress and apprehension usually related to the fear of a situation either real or imagined. Some physiological causes exist, and symptoms may be physical or psychological.
  • Anxiety due to labyrinthitis: Anxiety due to labyrinthitis refers to feelings of trepidation, nervousness, worry, and/or tension due to labyrinthitis.
  • Anxiety in children: Anxiety in children is a condition in which a child has feelings of trepidation, nervousness, worry, and/or tension.
  • Anxiety in pregnancy: Anxiety in pregnancy is a feeling of distress and apprehension usually related to the fear of a situation either real or imagined. Some physiological causes exist, and symptoms may be physical or psychological.
  • Anxiety, separation: A term used when children become upset when they are separated from a parent or carer. The situation is most commonly witnessed when children are taken to day care. Other situations include when the child is left with a baby sitter or made to sleep on his/her own. It is a normal condition during childhood.
  • Anxiety-tension syndrome: Anxiety associated with physical symptoms such as tense muscles and fatigue.
  • Anxious frantic appearance: an anxious state of mind
  • Aorta-pulmonary artery fistula: An abnormal opening or connection between the aorta and the main pulmonary artery. It can occur through a traumatic penetrating injury or may be a complication of surgery. Severe cases can lead to heart failure.
  • Aortic aneurysm, familial abdominal 1: A rare familial disorder where the abdominal aorta has a weak, bulging portion. The condition is asymptomatic but can result in death if it bursts. Type 1 is caused by a genetic defect on chromosome 19q13.
  • Aortic aneurysm, familial abdominal 2: A rare familial disorder where the abdominal aorta has a weak, bulging portion. The condition is asymptomatic but can result in death if it bursts. Type 2 is caused by a genetic defect on chromosome 4q31.
  • Aortic aneurysm, familial abdominal 3: A rare familial disorder where the abdominal aorta has a weak, bulging portion. The condition is asymptomatic but can result in death if it bursts. Type 3 is caused by a genetic defect on chromosome 9p21.
  • Aortic arch anomaly with peculiar facies and mental retardation: A very rare syndrome characterized by mental retardation, characteristic facial anomalies and abnormal position of the aorta.
  • Aortic supravalvular stenosis: A rare congenital condition involving increased intestinal calcium absorption and characterized by development delay, distinctive facial features, small nails and short stature.
  • Apathy: When an individual has a lack of feeling and emotion
  • Apeirophobia: An exaggerated or irrational fear of infinity.
  • Apert syndrome: A rare condition characterized by abnormalities in the appearance of the face and head as well as finger and toe abnormalities. The bones of the skull fuse together too early which prevents it from growing normally. Various toes and fingers may be fused together.
  • Aphasia: inability to produce and comprehend language
  • Aphasia-epilepsy, acquired: A rare childhood neurological disorder characterized by aphasia, epileptic seizures and inability to recognize sounds. The symptoms may develop quickly or gradually.
  • Apiophobia: An exaggerated or irrational fear of bees.
  • Aplastic anemia: A blood disorder where the bone marrow produces insufficient new blood cells.
  • Apnea: Periods of absence of breathing
  • Apnea of prematurity: AOP occurs in infants who are born prematurely (before 34 weeks of pregnancy).
  • Appian-Plutarch syndrome: Symptoms caused by excessive doses of a drug called atropine.
  • Apprehension: The feeling of suspicion or fear towards the future
  • Apprehension in pregnancy: Apprehension in pregnancy is a feeling of distress and anxiety usually related to the fear of a situation either real or imagined. Some physiological causes exist, and symptoms may be physical or psychological.
  • Apricot seed poisoning: Apricot seeds contain a chemical called amygdalin which breaks down into cyanide in the human body. The toxic chemicals are not released if the pit remains intact and therefore poisoning usually occurs if the seeds are crushed and eaten. Accidental ingestion is very unusual. Most parts of the apricot plant contain the toxic chemical with the highest concentration in young leaves. Different species of apricots have different levels of toxic chemical. Severe symptoms or even death can occur if children consume more than ten kernels or adults consume more than forty kernels. Theories exist that apricot kernels may help cancer sufferers but there has been no scientific studies that have proven this.
  • Arachibutyrophobia: An exaggerated or irrational fear of peanut butter sticking to the roof of the mouth.
  • Arachnephobia: An exaggerated or irrational fear of spiders.
  • Arachnodactyly -- ataxia -- cataract -- aminoaciduria -- mental retardation: A rare syndrome characterized mainly by congenital cataracts, ataxia, mental retardation, abnormal amino acid metabolism and long, thin fingers.
  • Arachnodactyly -- mental retardation -- dysmorphism: A very rare syndrome characterized by mental retardation, unusual facial features and long, thin fingers and toes.
  • Arachnoid Cysts: A rare disorder involving a fluid-filled cysts on the arachnoid membrane which is one of the thin layers of tissue that form a membrane which covers the spinal cord and brain. The type and severity of symptoms is determined by the size and location of the cyst.
  • Arachnoiditis: A progressive disorder where the arachnoid membrane becomes inflamed and the brain and spinal cord may also become inflamed.
  • Arakawa syndrome 1: An inherited metabolic disorder where an enzyme deficiency (glutamate formiminotrransferase) causes mental and physical retardation and degeneration of brain tissue.
  • Arbovirosis: An infectious disease caused by an arbovirus. The virus is transmitted by arthropods such as insects and ticks. Examples of arboviruses include Yellow Fever, Japanese encephalitis and tick-borne encephalitis. The symptoms may vary depending on the type of virus involved. The infection can lead to life-threatening brain inflammation.
  • Arctic bearded seal poisoning: The Arctic Bearded seal is often used as a food source by the arctic inhabitants. Eating the liver and kidneys of the arctic bearded seal can result in a Vitamin A overdose which can cause serious symptoms and even death in extreme cases. It is believed that eating more than 100-250 grams of the seal liver can result in human death.
  • Arena syndrome: A rare disorder characterized by mental retardation, spastic paraplegia and iron deposits in part of the brain that controls movement (basal ganglia).
  • Argentinean hemorrhagic fever: An infectious disease caused by the Junin virus. Transmission can occur through contact with infected rodent (usually the corn mouse) urine, feces or saliva. The incubation period lasts from one to two weeks. The disease is most common in rural workers in Argentina.
  • Arginase deficiency: A very rare urea cycle disorder caused by a deficiency of the enzyme (arginase) needed to convert ammonia to the urea which can then be removed in the urine. The condition leads to excess build-up of ammonia in the body which is toxic to the nervous system.
  • Arginine-glycine amidinotransferase deficiency: A rare enzyme deficiency which manifests as mental retardation, developmental delay and speech problemss
  • Argininosuccinase lyase deficiency, late onset: A rare inherited urea cycle disorder caused by lack of enzymes (argininosuccinase lyase) needed to turn ammonia into urea resulting in excess ammonia in the body. The late onset form of the condition tends to start later in life as there is some level of activity by the defective enzyme. The condition tends to be less severe and can be triggered by a change in diet, illness or some other stress on the body.
  • Argininosuccinase lyase deficiency, neonatal: A rare inherited urea cycle disorder caused by lack of enzymes (argininosuccinase lyase) needed to turn ammonia into urea resulting in excess ammonia in the body. The neonatal form of the condition can result in death or severe complications if not treated early enough.
  • Arima syndrome: A rare disorder characterized mainly by eye and brain abnormalities.
  • Arizona Bark Scorpion poisoning: A bite from the Arizona Bark scorpion contains chemicals toxic to the nerve system and can cause serious, life-threatening symptoms.
  • Arnold-Chiari malformation type 4: Arnold-Chiari malformation is a rare malformation where the base of the brain enters into the upper spinal canal. Type 4 actually involves a lack of development of a portion of the base of the brain (cerebellum). The prognosis is very poor with death often occurring during infancy.
  • Aromatic amino acid decarboxylase deficiency: A rare inborn error of metabolism involving the deficiency of an enzyme (aromatic L-amino acid decarboxylase) needed to process aromatic amino acids. This results in a deficiency of neurotransmitters such as dopamine and serotonin. The condition manifests as movement and neurological problems.
  • Arthritis: A condition which is characterized by the inflammation of a joint
  • Arthritis -- short stature -- deafness: A very rare syndrome characterized by arthritis, short stature, deafness and numerous other abnormalities.
  • Arthrogryposis -- epileptic seizures -- migrational brain disorder: A rare disorder characterized by congenital joint contractures, epileptic seizures and brain development abnormalities. It can be caused by fetal exposure to alcohol or chemical products.
  • Arthrogryposis IUGR thoracic dystrophy: A very rare syndrome characterized by congenital joint contractures, intrauterine growth retardation (IUGR) and ribcage abnormalities.
  • Arthrogryposis multiplex congenita, distal, X-linked: A rare condition characterized by the presence of contractures at birth as well as various other anomalies. The condition is X-linked.
  • Arthrogryposis, congenital -- myopathic seizures: A rare syndrome characterized by mental retardation and muscle problems.
  • Ascariasis: Large intestinal roundworm from 6 to 13 inches.
  • Aspartylglucosaminidase deficiency: A rare glycoprotein metabolism disorder caused by a deficiency of an enzyme called aspartylglucosaminidase. Patients tend to develop normally during the first few years of life and development continues slowly until adolescence when mental retardation becomes progressively worse.
  • Aspartylglucosaminuria: A rare glycoprotein metabolism disorder caused by a deficiency of an enzyme called aspartylglucosaminidase. Patients tend to develop normally during the first few years of life and development continues slowly until adolescence when mental retardation becomes progressively worse.
  • Aspartylglycosaminuria: A rare glycoprotein metabolism disorder caused by a deficiency of an enzyme called aspartylglucosaminidase. Patients tend to develop normally during the first few years of life and development continues slowly until adolescence when mental retardation becomes progressively worse.
  • Asperger Syndrome, Susceptibility to, 1: Asperger Syndrome is considered to be a mild form of autism and manifests in symptoms such as problems with social interactions and repetitive behavior patterns and interests. Language and cognition skills are considerable less affected than in autism. Researchers have discovered that there are a number genetic anomalies linked to an increased risk of developing Asperger Syndrome. Type 1 is linked to a defect on chromosome 3q25-q27.
  • Asperger Syndrome, Susceptibility to, 2: Asperger Syndrome is considered to be a mild form of autism and manifests in symptoms such as problems with social interactions and repetitive behavior patterns and interests. Language and cognition skills are considerable less affected than in autism. Researchers have discovered that there are a number genetic anomalies linked to an increased risk of developing Asperger Syndrome. Type 2 is linked to a defect on chromosome 17p13.
  • Asperger Syndrome, Susceptibility to, 3: Asperger Syndrome is considered to be a mild form of autism and manifests in symptoms such as problems with social interactions and repetitive behavior patterns and interests. Language and cognition skills are considerable less affected than in autism. Researchers have discovered that there are a number genetic anomalies linked to an increased risk of developing Asperger Syndrome. Type 3 is linked to a defect on chromosome 1q21-q22.
  • Asperger Syndrome, X-linked, Susceptibility to, 1: Asperger Syndrome is considered to be a mild form of autism and manifests in symptoms such as problems with social interactions and repetitive behavior patterns and interests. Language and cognition skills are considerable less affected than in autism. Researchers have discovered that there are a number genetic anomalies linked to an increased risk of developing Asperger Syndrome. X-linked type 1 is linked to a defect on chromosome Xq13.
  • Asperger Syndrome, X-linked, Susceptibility to, 2: Asperger Syndrome is considered to be a mild form of autism and manifests in symptoms such as problems with social interactions and repetitive behavior patterns and interests. Language and cognition skills are considerable less affected than in autism. Researchers have discovered that there are a number genetic anomalies linked to an increased risk of developing Asperger Syndrome. X-linked type 1 is linked to a defect on chromosome Xp22.3.
  • Asperger syndrome: A neuropsychiatric disorder mainly involving the inability to understand and becoming involved in social interaction.
  • Asphyxiating Thoracic Dystrophy: A rare genetic disorder characterized by short limbs, underdeveloped iliac wings and a narrow rigid thoracic cage that often results in asphyxiation.
  • Asthenophobia: An exaggerated or irrational fear of weakness or fainting.
  • Asthma: A condition which is characterized by recurrent attacks of paroxysmal dyspnoea
  • Astraphobia: An exaggerated or irrational fear of lightning and thunder.
  • Astrocytoma: A malignant tumour of the nervous system composed of astrocytes.
  • Astrophobia: An exaggerated or irrational fear of stars and celestial space.
  • Ataxia -- apraxia -- mental retardation, X-linked: A rare X-linked syndrome characterized mainly by ataxia, apraxia and mental retardation. The symptoms are generally nonprogressive.
  • Ataxia -- diabetes -- goiter -- gonadal insufficiency: A rare disorder characterized by diabetes, goiter, insufficient hormone production by the gonads and progressive ataxia.
  • Ataxia Telangiectasia: A rare inherited childhood disorder involving progressive degeneration of the nervous system.
  • Ataxia deafness reardon type: A rare syndrome observed in a Kuwati family characterized by ataxia, deafness and mental retardation.
  • Ataxia tapetoretinal degeneration: Conditions involving incoordination and an eye anomaly.
  • Ataxia, Hereditary, Autosomal Dominant: A group of rare, dominantly inherited neuromuscular disorder involving degeneration of the brain and spinal cord. The range, progression and severity of symptoms can vary quite considerably depending on the genetic defect involved.
  • Ataxiophobia: An exaggerated or irrational fear of muscular incoordination (ataxia). This disorder is not to be confused with ataxophobia which is a fear of disorder or untidiness.
  • Ataxophobia: An exaggerated or irrational fear of disorder or untidiness. This disorder is not to be confused with ataxiophobia which is a fear of muscular incoordination (ataxia).
  • Atelophobia: An exaggerated or irrational fear of imperfection.
  • Atephobia: An exaggerated or irrational fear of ruin.
  • Athabaskan brainstem dysgenesis: A rare neurological disorder caused by abnormal brainstem development and function.
  • Atherosclerosis, premature -- deafness -- diabetes mellitus -- photomyoclonus -- nephropathy -- degenerative neurologic disease: A rare syndrome characterized mainly by deafness, diabetes, epilepsy, kidney disease and premature hardening of the arteries.
  • Atherosclerosis- deafness -- diabetes -- epilepsy -- nephropathy: A rare syndrome characterized mainly by deafness, diabetes, epilepsy, kidney disease and premature hardening of the arteries.
  • Ativan overdose: Ativan is a prescription drug mainly used to treat anxiety. Excessive doses of the drug can result in various symptoms and even death in severe cases.
  • Atkin-Flatiz syndrome: A rare, X-linked syndrome characterized mainly by mental retardation and facial anomalies.
  • Atopic asthma: Atopic asthma is one of the most common forms of asthma and is triggered by exposure to an allergen. Upon exposure to the allergen, the airways become constricted and inflamed which affects breathing. The severity of symptoms is variable. This form of asthma is more common in children than adults.
  • Atrichia -- mental and growth delay: A rare syndrome characterized mainly by mental retardation, growth delay and the absence of hair.
  • Attacks of crying: bouts of crying
  • Attacks of laughing: sudden bouts of laughter
  • Attacks of rage: episodes of increased anger
  • Attention Deficit Hyperactivity Disorder: Behavioral disorder with hyperactivity and/or inattention.
  • Attention Deficit and Disruptive Behavior Disorders: A condition characterized by attention problems and disruptive behavior. The condition is considered to be a grouping of three other disorders - oppositional defiant disorder, conduct disorder and attention-deficit hyperactivity disorder.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 1: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 1 is linked to a defect on chromosome 16p13.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 2: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 2 is linked to a defect on chromosome 17p11.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 3: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 3 is linked to a defect on chromosome 6q12.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 4: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 4 is linked to a defect on chromosome 5p13.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 5: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 5 is linked to a defect on chromosome 2q21.1.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 6: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 6 is linked to a defect on chromosome 13q12.11.
  • Attention Deficit-Hyperactivity Disorder, Susceptibility to, 7: ADHD or attention deficit hyperactivity disorder is a common neurobehavioral developmental disorder that usually occurs in childhood and can continue into adulthood. Researchers have discovered a number of genes linked to an increased susceptibility to ADHD. Type 7 is linked to a defect on chromosome 12q21.
  • Attenuated congenital adrenal hyperplasia: A late onset form of congenital adrenal hyperplasia where insufficient adrenal corticosteroids are produced by the body due to the deficiency of a particular chemical. The severity of symptoms varies from person to person and onset may occur as early as childhood.
  • Atypical hemolytic uremic syndrome: A rare condition characterized by hemolytic anemia, thrombocytopenia and kidney failure that has no obvious cause.
  • Atypical pyridoxine-dependent seizures: A form of epilepsy which responds to anticonvulsant therapy for only a period of time but are able to be managed by pyridoxine supplementation after a few months. Seizures may disappear for a few months even after pyridoxine supplementation is ceased.
  • Auditory Processing Disorder: Failure of the brain to correctly process sound.
  • Auditory hallucinations: An auditory perception that has no basis on external stimulation.
  • Auditory perceptual disorder: A hearing disorder where the brain is unable to properly process or interpret auditory information it receives from the hearing organs.
  • Aughton syndrome: A very rare syndrome characterized primarily by small eyes, cleft palate, mental retardation and dextrocardia (heart located on right side of chest instead of left).
  • Aulophobia: An exaggerated or irrational fear of flutes.
  • Aural atresia -- multiple congenital anomalies -- mental retardation: A rare syndrome characterized by a number of malformations as well as mental retardation.
  • Auralcephalosyndactyly: A very rare syndrome characterized by ear abnormalities, premature fusion of skull bones and syndactyly (fusion of digits).
  • Aurophobia: An exaggerated or irrational dislike of gold.
  • Auroraphobia: An exaggerated or irrational fear of Auroral lights.
  • Australian Sea Lion poisoning: The Australian Sea Lion is sometimes used as a food source and is found in the South-Southwest waters of Australia. Eating the liver of the Australian Sea Lion can result in a Vitamin A overdose which can cause serious symptoms and even death in extreme cases.
  • Austrian syndrome: A condition where alcoholism is associated with heart failure and pneumococcal meningitis.
  • Autism: Childhood mental condition with social and communication difficulties.
  • Autism, Susceptibility to, 15: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 15 is linked to a genetic defect on chromosome 7q35-q36.
  • Autism, X-linked, susceptibility to, 1: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. X-Linked type 1 is linked to a genetic defect on chromosome Xq13.
  • Autism, X-linked, susceptibility to, 2: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. X-Linked type 2 is linked to a genetic defect on chromosome Xp22.3.
  • Autism, X-linked, susceptibility to, 3: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. X-Linked type 3 is linked to a genetic defect on chromosome Xp22.3.
  • Autism, susceptibility to, 1: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 1 is linked to a genetic defect on chromosome 7q22.
  • Autism, susceptibility to, 10: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 10 is linked to a genetic defect on chromosome 7q36.
  • Autism, susceptibility to, 11: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 11 is linked to a genetic defect on chromosome 1q24.
  • Autism, susceptibility to, 12: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 12 is linked to a genetic defect on chromosome 21p13-q11.
  • Autism, susceptibility to, 13: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 13 is linked to a genetic defect on chromosome 12q14.
  • Autism, susceptibility to, 14: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 14 is linked to a genetic defect on chromosome 16p11.2.
  • Autism, susceptibility to, 3: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 3 is linked to a genetic defect on chromosome 13q14.
  • Autism, susceptibility to, 4: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 4 is linked to a genetic defect on chromosome 15q11.
  • Autism, susceptibility to, 5: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 5 is linked to a genetic defect on chromosome 2q.
  • Autism, susceptibility to, 6: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 6 is linked to a genetic defect on chromosome 17q11.
  • Autism, susceptibility to, 7: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 7 is linked to a genetic defect on chromosome 17q21.
  • Autism, susceptibility to, 8: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 8 is linked to a genetic defect on chromosome 3q25-q27.
  • Autism, susceptibility to, 9: A developmental disorder characterized by an impaired ability to communicate with or relate to people or the environment around them and repetitive behavior. The severity of the disorder is variable. Researchers have discovered a number of genetic abnormalities linked to an increased susceptibility of developing autism. Type 9 is linked to a genetic defect on chromosome 7q31.
  • Autistic conditions: Medical conditions related to autism or autism spectrum disorders.
  • Autoimmune Hemolytic Anemia: Autoimmune hemolytic anemia is characterized by an abnormal immune system response which leads to the destruction of red blood cells and hence anemia. The severity of the condition varies depending on the underlying cause e.g. cytomegalovirus, hepatitis, HIV and lupus. The condition may develop gradually or occur suddenly and cause serious symptoms.
  • Autoimmune Hepatitis: Liver inflammation caused due to autoimmune processes where the body's immune system attacks the liver.
  • Autoimmune limbic encephalitis: Limbic encephalitis is an inflammation of the limbic system which is the part of the brain responsible for basic autonomic functions. In the paraneoplastic type, the inflammation is caused by autoimmune processes.
  • Autoimmune thyroid disease associated Celiac Disease: Patients with autoimmune thyroid disease are more susceptible to developing celiac disease than the average population. Celiac disease is an autoimmune disorder characterized by intolerance to gluten by the small intestine. The type and severity of symptoms varies amongst people - some people have severe gastrointestinal symptoms from infancy whereas other have no symptoms other than fatigue or anemia during adulthood.
  • Autoimmune thyroid diseases: Autoimmune diseases of the thyroid gland.
  • Automatisms: Mechanical, seemingly aimless behavior characteristic of various mental disorders

Conditions listing medical symptoms: Behavioral symptoms:

The following list of conditions have 'Behavioral symptoms' or similar listed as a symptom in our database. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.

Select from the following alphabetical view of conditions which include a symptom of Behavioral symptoms or choose View All.

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Conditions listing medical complications: Behavioral symptoms:

The following list of medical conditions have 'Behavioral symptoms' or similar listed as a medical complication in our database.

 

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