An epidermoid tumor in the skull: A case report

Abstract

A rare case of the epidermoid tumor in the skull is presented here. A 23-year-old woman was admitted to our hospital for examination of unconsciousness attack. Skull X-ray showed a bone defect with sclerotic margin in the left parietal skull. CT showed a low density mass lesion with rim-enhancement. Bone density CT and 3-dimensional CT using helical CT scan were useful for detecting the osteolytic lesion. MRI showed a hypo-intensity area on T1-weighted image and hyper-intensity area on T2-weighted image. On bone scintigram, only the margin of the tumor was stained as a hot area. From these findings, this tumor was diagnosed as epidermoid. We discussed the clinical features and radiological characteristics of the epidermoid in the skull.