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- Disorder of neuronal organization
- Occurs after neuronal migration
- Extent of involvement varies from small, isolated, unilateral areas to large bilateral areas
- Overconvoluted and fused cortex of normal thickness
- Sometimes associated with CMV or underlying neurometabolic disorder
Imaging
- Broad thickened gyra (mimicking pachygyria) to overconvoluted multiple gyri with irregular outer and inner cortical surfaces
- May show dystrophic calcification