ICD-11 classes
20 Developmental anomalies
Structural developmental anomalies primarily affecting one...
Structural developmental anomalies of the nervous system
LA05 — Cerebral structural developmental anomalies
LA05.5 — Abnormal neuronal migration
LA05.50 — Polymicrogyria
ICD-11 LA05.50 — Polymicrogyria
Polymicrogyria (PMG) is a cerebral cortical malformation characterised by excessive cortical folding and by shallow sulci. Microscopic examination reveals abnormal cortical layering. Topographic distribution of PMG is variable, but bilateral symmetrical perisylvian PMG (BPP) is the most frequent form. PMG is manifested by mild intellectual deficit, epilepsy, and pseudobulbar palsy, which causes difficulties with speech learning and feeding. The severity of PMG is highly dependent on the location and size of the affected area.
The diagnosis includes nothing.
The diagnosis excludes nothing.
It has no clarifying diagnoses.
The diagnosis is coded elsewhere: