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Pathol Int. 2000 Aug;50(8):667-71.

Periosteal osteoblastoma: a case report and a review of the literature.

Author information

1
Clinical Institute of Clinical Pathology, University of Vienna Medical School, Vienna, Austria. irene.sulzbacher@akh-wien.ac.at

Abstract

Osteoblastomas located on the surface of cortical bone, so-called periosteal (juxtacortical) osteoblastomas, are extremely rare. A 24-year-old man complained of pain and swelling in the left knee. The clinical and radiological investigation showed a tumor located in the posterior portion of the distal shaft of the femur. The radiological differential diagnosis included parosteal osteosarcoma, periosteal chondroma and periostitis ossificans. A frozen section was obtained and histology revealed an osteoblastoma with large epithelioid-appearing osteoblasts consistent with an aggressive osteoblastoma. An en bloc resection of the tumor was performed and the definitive histology of the whole specimen revealed a typical osteoblastoma. The authors draw attention to the fact that periosteal osteoblastoma is a rare tumor that could be mistaken clinically and histologically for other and more common tumors at this location.

PMID:
10972867
[Indexed for MEDLINE]

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