Osteoblastoma of the proximal ulna, an unusual cause of ulnar wrist pain. A case report.

During the diagnostic investigation of a patient with ulnar wrist pain, a hot spot in the proximal ulna was revealed on the technetium scintigram, which was found on radiographs to correspond to an osteolytic lesion in the proximal ulna. The lesion was resected and the histological diagnosis was an osteoblastoma. The wrist symptoms disappeared after resection of the lesion in the proximal ulna.