Korean J Pathol.
2000 Mar;34(3):243-247.
Hemimegalencephaly: A case report
- Affiliations
-
- 1Department of Clinical Pathology, College of Medicine, The Catholic University of
Korea, Seoul 137-040, Korea.
Abstract
-
Hemimegalencephaly is an uncommon sporadic congenital malformation of the
central nervous system characterized by enlargement of one cerebral hemisphere with
cranial asymmetry, hemiparesis, epilepsy, and mental retardation. This report deals with
a 12-month-old girl with intractable seizure and developmental delay, who revealed
hemispheric asymmetry and enlarged right cerebral hemisphere. MRI scan revealed
asymmetric enlargement of right cerebral hemisphere with lissencephaly and multifocal
calcification. She underwent right frontal lobectomy and parietal cortical resection, but
died of complication of surgery. Histological features included loss of cortical lamination,
large atypical neurons, neuronal heterotopia, and astrocytosis with dystrophic
calcification. The heterotopic neurons in the white matter were suggestive of aberrant
neuronal migration.