Diseases

Lissencephaly

A smooth brain malformation of the CEREBRAL CORTEX resulting from the abnormal location of developing neurons during corticogenesis. It is characterized by an absence of normal convoluted indentations on the surface of the brain (agyria), or fewer and shallower indentations (pachygryia). There is a reduced number of cortical layers, typically 4 instead of 6, resulting in a thickened cortex, and reduced cerebral white matter that is a reversal of the normal ratio of cerebral white matter to cortex.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A smooth brain malformation of the CEREBRAL CORTEX resulting from the abnormal location of developing neurons during corticogenesis. It is characterized by an absence of normal convoluted indentations on the surface of the brain (agyria), or fewer and shallower indentations (pachygryia). There is a reduced number of cortical layers, typically 4 instead of 6, resulting in a thickened cortex, and reduced cerebral white matter that is a reversal of the normal ratio of cerebral white matter to cortex.

MeSH Record

Classification

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MeSH Record

Synonyms

10 entry terms
  • Lissencephalia
  • Lissencephalies
  • Agyria
  • Broad Gyri of Cerebrum
  • Large Gyri of Cerebrum
  • Macrogyria
  • Pachygyria
  • Agyrias
  • Macrogyrias
  • Pachygyrias

MeSH Record

Aspects Covered

34 allowable subheadings

Indexed with the subheadings blood, cerebrospinal fluid, chemically induced, classification, complications, diagnosis, diagnostic imaging, diet therapy, drug therapy, economics, embryology, enzymology, epidemiology, ethnology, etiology, genetics, history, immunology, metabolism, microbiology, mortality, nursing, parasitology, pathology, physiopathology, prevention & control, psychology, radiotherapy, rehabilitation, surgery, therapy, urine, veterinary, virology.

MeSH Record

Indexing Annotation

note specifics; MICROLISSENCEPHALY see MICROCEPHALY is also available

MeSH Record

History Note

2008

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Lissencephaly. Medical Subject Headings (MeSH). 2026. Unique ID D054082. http://id.nlm.nih.gov/mesh/2026/D054082
  2. Lissencephaly. In: Wikipedia. https://en.wikipedia.org/wiki/Lissencephaly
  3. Lissencephaly. In: Wikidata. https://www.wikidata.org/wiki/Q1544416