Giant cerebriform intradermal nevus.

Giant cerebriform intradermal nevus (GCIN) is a form of cutis verticis gyrata and may be associated with a number of systemic diseases. Clinically it manifests itself as a scalp deformity resembling the surface of the brain with cerebriform morphologic characteristics. Degeneration into malignant melanoma has been reported. We herein report 3 cases of GCIN successfully treated by surgical extirpation and scalp flap reconstruction.