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Unlayered and layered polymicrogyria in juxtaposition

Unlayered and 4-layered cortex in juxtaposition. (Used with permission from Elsevier Science Inc. Hevner R, Horoupian D. Pena-Shokeir phenotype associated with bilateral opercular polymicrogyria. Pediatr Neurol 1996;15:348-51.)

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