Hemangioma of bone arising in the ulna: imaging findings with emphasis on MR

An 18-year-old woman presented with left elbow joint pain. Radiographs and computed tomographic scan showed a well-defined osteolytic lesion of the le ft ulna associated with a honeycomb appearance on the radiographs. Magnetic resonance images showed intermediate signal intensity on T1-weighted image s and mixed intermediate and high signal intensities on T2-weighted images. Only the periphery of the lesion enhanced with intravenously injected gado linium-diethylenetriamine pentaacetic acid. The lesion was curetted to avoi d pathologic fracture, and a histologic diagnosis of cavernous hemangioma o f bone was made. Hemangioma involving the ulna is rare, but should be inclu ded in the differential diagnosis of a radiographic osteolytic lesion with a honeycomb appearance.