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A rare congenital brain disorder characterized by complete or almost near-complete unilateral absence of the cortical cortex, which is filled by a sac of cerebrospinal fluid. The presumed cause is a prenatal vascular disruption with occlusion of the carotid artery territories ipsilateral to the damaged brain.
Data assembled from 1 of 12 sources · Last updated Sep 20, 2026, 9:37 AM UTC