Cranial fasciitis is a rare fibroblastic tumor which shows a predilection for the scalp of young children. We present a child with a rapidly growing mass and lytic skull lesion which on pathologic evaluation was diagnosed as cranial fasciitis. Histologically this lesion was identical to nodular fasciitis which was typically found in the trunk and extremities of adults. Cranial fasciitis is unique in that it may present as a lytic lesion in the skull, but this disease entity is not widely known to pathologists and radiologists, and should be included in the differential diagnosis of fibroblastic lesion occurring in the cranium of young children.