Pathologic Fracture Due to an Osteoblastoma of the Humerus Shaft: A Case Report

produce osteoid and primitive woven bone. This tumor is most frequently observed in patients younger than 30 years, although the age distribution ranges from 2 to 75 years. The bony trabeculae are variably calcified; some have much calcification, while others have abundant thick, pink osteoid with no mineralisation making the lesion friable. They may affect any bone; the spine and sacrum are common sites and the humerus is a very rare site. Authors experienced an unusual pathological fracture due to an osteoblastoma located at the humerus shaft and this report describes the clinical, pathological and radiological findings and treatment with an intramedullary nail and bone allograft after curettage of the lesion of pathologic fracture due to an osteoblastoma.

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