[X-ray computer tomography findings of brain and skull bone epidermoid cyst].

Brain and skull bone epidermoid cysts were confirmed by CT and operation in 32 cases (29 in brain, 3 in skull bone and scalp). Typical CT findings of epidermoid cyst were unenhanced hypodense areas with well-defined margin, closed contact with cisterns, and without surrounding edema. CT findings of atypical location and differential diagnosis are discussed.