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Symptoms » Mental retardation

Mental retardation

Mental retardation: Introduction

Mental retardation: Reduced mental ability or intelligence. See detailed information below for a list of 2098 causes of Mental retardation, Symptom Checker, Assessment Questionnaire, including diseases and drug side effect causes.

» Review Causes of Mental retardation: Causes | Symptom Checker » | Assessment Questionnaire »

Causes of Mental retardation:

The following medical conditions are some of the possible causes of Mental retardation. There are likely to be other possible causes, so ask your doctor about your symptoms.

» Review Causes of Mental retardation: Causes | Symptom Checker » | Assessment Questionnaire »

Home Diagnostic Testing and Mental retardation

Home medical tests possibly related to Mental retardation:

Causes of Types of Mental retardation:

Review the causes of these more specific types of Mental retardation:

Review causes of more specific types of Mental retardation:

Mental retardation: Symptom Checker

Listed below are some combinations of symptoms associated with Mental retardation, as listed in our database. Visit the Symptom Checker, to add and remove symptoms and research your condition.

Symptom Checker

Symptom Checker

Mental retardation Treatments

Review further information on Mental retardation Treatments.

Stories from Users for Mental retardation

Real-life user stories relating to Mental retardation:

Message Boards for Mental retardation

Symptom specific forums: The following patient stories in our interactive forums and message boards relate to Mental retardation or relevant symptoms:

Diagnostic tests for Mental retardation:

Various tests are used in the diagnosis of Mental retardation. Some of these are listed below :

  • General appearance
    • Looking for any characteristic dysmorphic ( abnormality of shape) features of face and body - e.g. Down syndrome, Cornelia de Lange syndrome, Prader-Willi syndrome, Soto's syndrome.
    • Observe the child's behavior and interaction with yourself. If child is alert, interested in new objects, keen to explore and relates in a friendly manner, a developmental problem is more likely because of an isolated condition rather than global retardation
  • Physical examination
    • Growth - including head circumference.
    • Observe infant health clinic booklet - to check growth patterns of weight, height and head circumference.
  • more tests...»

Mental retardation: Comorbid Symptoms

Some of the comorbid or associated medical symptoms for Mental retardation may include these symptoms:

Causes of General Symptom Types

Research the causes of these more general types of symptom:

Research the causes of related medical symptoms such as:

Causes of Similar Symptoms to Mental retardation

Research the causes of these symptoms that are similar to, or related to, the symptom Mental retardation:

Assessment Questionnaire: Questions your doctor may ask (and why!)

During a consultation, your doctor will use various techniques to assess the symptom: Mental retardation. These will include a physical examination and possibly diagnostic tests. (Note: A physical exam is always done, diagnostic tests may or may not be performed depending on the suspected condition) Your doctor will ask several questions when assessing your condition. It is important to openly share any pertinent information to help your doctor make an accurate diagnosis.

It is also very important to bring an up-to-date list of all of your all medical conditions, medications including dosages, and names of numbers of any specialist you see.

Create your printable checklist here.

See Mental retardation Assessment Questionnaire (26 listings)

Mental retardation: Deaths

Read more about causes and Mental retardation deaths.

Misdiagnosis and Mental retardation

Rare copper disease insidious and misdiagnosed: Wilson's disease (a form of copper overload) is a rare disorder that has a slow and insidious onset that more »

Undiagnosed stroke leads to misdiagnosed aphasia: BBC News UK reported on a man who had been institutionalized and treated for mental illness because he suffered more »

Dementia may be a drug interaction: A common scenario in aged care is for a patient to show mental decline to dementia. Whereas this can, of course, more »

ADHD under-diagnosed in adults: Although the over-diagnoses of ADHD in children is a well-known controversy, the reverse side related to adults. Some adults can remain undiagnosed, and indeed the condition has usually been overlooked throughout childhood. There are more »

Bipolar disorder misdiagosed as various conditions by primary physicians: Bipolar disorder (manic-depressive disorder) often fails to be diagnosed correctly by primary care physicians. Many patients with bipolar seek help from their physician, more »

Eating disorders under-diagnosed in men: The typical patient with an eating disorder is female. The result is that men with eating disorders often fail to be diagnosed or have a delayed diagnosis. See more »

Depression undiagnosed in teenagers: Serious bouts of depression can be undiagnosed in teenagers. The "normal" moodiness of teenagers can cause severe medical more »

Undiagnosed anxiety disorders related to depression: Patients with depression (see symptoms of depression) may also have undiagnosed anxiety disorders (see symptoms more »

Mental retardation: Research Related Doctors & Specialists

Other ways to find a doctor, or use doctor, physician and specialist online research services:

Hospitals & Clinics: Mental retardation

Research extensive quality ratings and patient safety measures for hospitals, clinics and medical facilities in health specialties related to Mental retardation:

Mental retardation: Related Rare Diseases

Rare types of medical conditions and diseases in related medical categories:

Mental retardation: Undiagnosed Conditions

Conditions that are commonly undiagnosed in related areas may include:

Causes of Mental retardation listed in Disease Database:

Other medical conditions listed in the Disease Database as possible causes of Mental retardation as a symptom include:

Definitions of Mental retardation:

Subnormal intellectual functioning which originates during the developmental period. This has multiple potential etiologies, including genetic defects and perinatal insults. Intelligence quotient (IQ) scores are commonly used to determine whether an individual is mentally retarded. IQ scores between 70 and 79 are in the borderline mentally retarded range. Scores below 67 are in the retarded range. (Joynt, Clinical Neurology, 1992, Ch55, p28)
- (Source - Diseases Database)

Lack of normal development of intellectual capacities
- (Source - WordNet 2.1)

Subnormal intellectual functioning which originates during the developmental period; multiple potential etiologies, including genetic defects and perinatal insults; intelligence quotient (IQ) scores are commonly used to determine whether an individual is mentally retarded; IQ scores between 70 and 79 are in the borderline mentally retarded range and scores below 67 are in the retarded range.
- (Source - CRISP)

Organs affected by Mental retardation:

The list of organs typically affected by Mental retardation may include, but is not limited to:

Detailed list of causes of Mental retardation

The list below shows some of the causes of Mental retardation mentioned in various sources:

How Common are these Causes of Mental retardation?

This information refers to the general prevalence and incidence of these diseases, not to how likely they are to be the actual cause of Mental retardation. Of the 2098 causes of Mental retardation that we have listed, we have the following prevalence/incidence information:

  • 0 causes are "very common" diseases
  • 3 causes are "common" diseases
  • 5 causes are "uncommon" diseases
  • 21 causes are "rare" diseases
  • 24 causes are "very rare" diseases
  • 2053 causes have no prevalence information.

Conditions listing medical symptoms: Mental retardation:

The following list of conditions have 'Mental retardation' 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 Mental retardation or choose View All.

View All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #









Conditions listing medical complications: Mental retardation:

The following list of medical conditions have Mental retardation or similar listed as a medical complication in our database. The distinction between a symptom and complication is not always clear, and conditions mentioning this symptom as a complication may also be relevant. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.


















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Causes of Mental retardation Based on Risk Factors

This information shows analysis of the list of causes of Mental retardation based on whether certain risk factors apply to the patient:

  • Travel - has the patient travelled recently?

    Doctors and specialists: Who should I consult about Mental retardation?

    Depending on the seriousness of the onset of Mental retardation, you may want to consult one of the following medical professionals.

    Important:In extreme cases, always seek advice from emergency services :

    What are the alternative names for Mental retardation:

    Oligophrenia, Learning disability, Cognitive development disorder, ESN, Educationally sub-normal, IQ low, Intellectual impairment
    - (Source - Diseases Database)

    Classifications of Mental retardation:

    Subtypes of Mental retardation:

    Mental dullness (6 causes)

    Medical Conditions associated with Mental retardation:

    Mental problems (3121 causes), Behavioral symptoms (4608 causes), Personality symptoms (4029 causes), Cognitive symptoms (3664 causes), Developmental symptoms (4007 causes), Infant symptoms (2900 causes), Child health symptoms (230 causes)

    Symptoms related to Mental retardation:

    Developmental delay, Speech symptoms (1393 causes), Mental symptoms (3121 causes), Cerebral palsy, Down's syndrome, Kidney disease, Congenital disoders

    Medical articles on signs and symptoms:

    Doctor-patient articles related to symptoms and diagnosis:

    These general medical articles may be of interest:

    Medical News summaries about Mental retardation

    Our news pages contain the following medical news summaries about Mental retardation and many other medical conditions:

    Evidence Based Medicine Research for Mental retardation

    Medical research papers related to Mental retardation include:

    Research More Evidence-Based Medicine at

    Related medical articles from our Disease Center for Mental retardation -- dysmorphism -- hypogonadism -- diabetes:

    More Ways To Research Medical Signs and Symptoms:


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