Male, 32 years old, with epilepsy, preoperative evaluation for depth electrode placement. Again seen is an undulating band of subcortical tissue which matches signal characteristics of gray matter involving the bilateral cerebral hemispheres. No definite evidence of parenchymal edema or mass effect is seen. No abnormal extra-axial collections are noted. No pathologic parenchymal or extra-axial enhancement is observed. Volume loss of the cerebellum is redemonstrated. Choroid plexus cysts are noted incidentally at the atria.
Findings compatible with band heterotopia.