Tohoku J. Exp. Med., 2001, 194 (4)

Case Report

Chondroblastoma of a Metacarpal Bone Mimicking an Aneurysmal Bone Cyst: A Case Report and a Review of the Literature

TAKUYA KUDO, KYOJI OKADA, YOSHINORI HIRANO¹ and MASATO SAGESHIMA²

Department of Orthopaedics, ¹Department of Radiology, Akita University School of Medicine, and
²Division of Clinical Pathology, Akita University Hospital, Akita 010-8543

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.

Keywords —— chondroblastoma; metacarpal; bone neoplasms; aneurysmal bone cyst

© 2001 Tohoku University Medical Press

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Tohoku J. Exp. Med., 2001, 194, 251-257

Address for reprints: Kyoji Okada, M.D., Department of Orthopaedics, Akita University School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.

e-mail: cshokada@med.akita-u.ac.jp