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Diseases » Agyria » Glossary

Glossary for Agyria

  • Agyria pachygyria polymicrogyria: A very rare disorder characterized by abnormal brain development.
  • Brain conditions: Medical conditions that affect the brain
  • Dup (3) (pter-p22.1): A rare chromosomal disorder characterized by various anomalies. The listed symptoms are those observed in one reported case. The manifestations linked to most genetic defects are often variable to some degree.
  • Failure To Thrive: Slow growth or inadequate weight gain of an infant or child.
  • HARD syndrome (Hydrocephalus -- agyria -- retinal dysplasia): A rare genetic disorder characterized by a smooth brain surface and eye, genitourinary and other abnormalities.
  • Head Conditions: Conditions that affect the head
  • Lennox-Gastaut Syndrome: A form of epilepsy that occurs mostly in preschool-aged children and is characterized mainly by absences.
  • Lissencephaly: A very rare disorder characterized by abnormal brain formation so that the brain surface appears smooth rather than convoluted.
  • Lissencephaly 3: A rare brain malformation where the surface of the brain is smoother than normal. The brain abnormality causes symptoms such as mental retardation and seizures. The severity of the disorder is variable and is caused by a genetic defect on chromosome 12q12-q14.
  • Lissencephaly type 1, due to LIS 1 anomalies: A rare brain malformation where the surface of the brain is smoother than normal. Type 1 is caused by a defect on the LIS1 gene on chromosome 17p13.3. The severity of the symptoms are variable depending on the severity of the brain abnormality. Miller-Dieker syndrome is a subtype of this condition.
  • Lissencephaly type III -- metacarpal bone dysplasia: A rare syndrome characterized by an abnormally smooth brain as well as abnormal bone development in the hands.
  • Miller-Dieker syndrome: A rare genetic disorder characterized by a smooth brain surface. The condition occurs because of deletion of genetic material from the short arm of chromosome 17 ath a particular location (17p13.3).
  • Muscle spasticity: abnormal muscular hyperactivity in the muscle tone
  • Nervous system conditions: Diseases affecting the nerves and the nervous system.
  • Neurological symptoms: Any symptoms that are caused by neurological conditions
  • Neuronal Migration Disorders: Group of disorders caused by abnormal growth of nerves in the brain and head.
  • Psychomotor retardation: Psychomotor retardation refers to a slowing of physical movement and speech and activity caused by a mental health or emotional condition, such as depression.
  • Seizures: A rare syndrome characterized by mental retardation, seizures and high levels of hydroxylysine in the urine.
  • Walker-Warburg Syndrome: A rare inherited disorder characterized by brain malformations and retinal and muscle abnormalities.


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