title: Chondroblastoma of a metacarpal bone mimicking an aneurysmal bone cyst: a case report and a review of the literature.
abstract: Chondroblastoma of the metacarpal bone has been extremely rare and only seven cases have been reported in the English literature. Here we reported the eighth case of a chondroblastoma that developed on the first metacarpal bone of the right hand of a 21-year-old man. Radiographs showed an expansile osteolytic lesion with a multilocular appearance. In MR images, the lesion showed low intensity in T1 and high intensity in T2-weighted images with multiple fluid-fluid levels, which are findings resembling those of an aneurysmal bone cyst. From the pathological findings, however, it was recognized as a chondroblastoma with aneurysmal bone cyst-like change. Good clinical results was obtained by the subtotal resection of the metacarpal bone with a columnar-shaped iliac bone graft.
authors.affiliation: Department of Orthopaedics, Akita University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kudo
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: Y
authors.initials: Y
authors.lastname: Hirano
authors.forename: M
authors.initials: M
authors.lastname: Sageshima
mesh_terms: D000328:Adult; D017824:Bone Cysts, Aneurysmal / Q000175:diagnosis*; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D016025:Bone Transplantation; D002804:Chondroblastoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008663:Metacarpus; D014057:Tomography, X-Ray Computed