Congenital Abnormality
pachygyria
Definitions related to pachygyria:
  • Pachygyria is a malformation of cortical development with abnormally wide gyri with sulci 1,5-3 cm apart and abnormally thick cortex measuring more than 5 mm (radiological definition). See also neuropathological definitions for 2-, 3-, and 4-layered lissencephaly.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Pachygyria is a malformation of cortical development with abnormally wide gyri with sulci 1,5-3 cm apart and abnormally thick cortex measuring more than 5 mm (radiological definition). See also neuropathological definitions for 2-, 3-, and 4-layered lissencephaly.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Pachygyria is a developmental condition due to abnormal migration of nerve cells (neurons) in the developing brain and nervous system. With pachygyria, there are few gyri (the ridges between the wrinkles in the brain), and they are usually broad and flat. The condition is also known as "incomplete lissencephaly." Pachygyria may occur...
    NIH Genetic and Rare Diseases
    National Center for Advancing Translational Sciences
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