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Glossary for Agyria pachygyria polymicrogyria

  • Agyria: A condition which is characterized by the malformation or absence of the convolutions of the cerebral cortex
  • Brain conditions: Medical conditions that affect the brain
  • Head Conditions: Conditions that affect the head
  • Intellectual or developmental disabilities: Disorders of physical or intellectual development.
  • Mental retardation: A very rare syndrome characterized mainly by mental retardation, hypogonadism, diabetes and facial and skull abnormalities.
  • Mental retardation conditions: Medical conditions related to or causing mental retardation.
  • Nervous system conditions: Diseases affecting the nerves and the nervous system.
  • Pachygyria: A condition which is characterized by the presence of thick convolutions of the cerebral cortex
  • Polymicrogyria: Polymicrogyria refers to abnormal brain development where the brain has abnormally smooth gyri (convolutions) on the surface of the brain. The anomaly is often occurs as part of another syndrome. Patients can present with a wide range and severity of symptoms which can make the prognosis difficult to determine.


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