Malformations of Cortical Development, Group I

**Definition:** Cortical malformations secondary to abnormal neuronal and glial CELL PROLIFERATION or APOPTOSIS in NEUROGENESIS. This group includes congenital MICROCEPHALIES; MICROLISSENCEPHALIES, megalencephalies, HEMIMEGALENCEPHALIES and cortical dysplasias with balloon cells.

**Tree numbers:** - C10.500.507.400 - C16.131.666.507.400

**Synonyms:** - Abnormal Proliferation Cortical Malformations - Cortical Malformations, Group I - Malformations Secondary to Abnormal Neuronal and Glial Proliferation or Apoptosis - Malformations Due to Abnormal Neuronal and Glial Proliferation or Apoptosis