title: Cystic fibrous dysplasia mimicking giant cell tumor: MRI appearance.
abstract: We report the case of a 43-year-old man who presented with an osteolytic and expansive lesion in the left distal femur mimicking a giant cell tumor. Magnetic resonance imaging (MRI) showed that most of the lesion was cystic, and histological examination revealed fibrous dysplasia with marked cystic degeneration. Radiographic findings of cystic fibrous dysplasia in the end of a long bone may be similar to those of a giant cell tumor, and a biopsy is essential for the final diagnosis.
authors.affiliation: Department of Orthopaedics, Akita University School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: S
authors.initials: S
authors.lastname: Yoshida
authors.forename: K
authors.initials: K
authors.lastname: Okane
authors.forename: M
authors.initials: M
authors.lastname: Sageshima
mesh_terms: D000328:Adult; D001706:Biopsy; D001845:Bone Cysts / Q000150:complications / Q000175:diagnosis*; D001859:Bone Neoplasms / Q000150:complications / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology*; D005357:Fibrous Dysplasia of Bone / Q000150:complications / Q000175:diagnosis*; D018212:Giant Cell Tumor of Bone / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography