GIANT EPIDERMOID INVOLVING 3 CRANIAL BONES

We describe a patient with an incidental finding of an expansile osteo lytic lesion centered in the sphenoid involving 3 cranial bones-fronta l, temporal, and sphenoid-and invading the brain parenchyma and orbit, Biopsy demonstrated an epidermoid. The lesion was excised through fro ntotemporal craniotomy. Despite the benign nature of the tumor, the ep idermoid had a destructive pattern of growth. Complete resection was n eeded to adequately address the inflammatory mass effect of the large lesion.