Ossifying fibroma is relatively common in the maxilla, but rare in the cranial vault. A 10-year-old girl was referred for painful swelling of the left temporal region. On admission, she presented no abnormal physical and neurological findings except for the painful swelling. Plain skull X-ray films showed a radiolucent lesion of the left temporal bone about 4 cm in diameter, with a hyperostotic area of the parietal side. Computed tomography scan using bone window level also showed an abnormal density lesion in the same site. Curettage of this tumor was performed from a cosmetic point of view and at the family's petition. Histological examination showed vascular fibrous tissue in which lamellar bone was surrounded by osteoblasts.
