Many bone lesions have a characteristic roentgen appearance, while others create diagnostic dilemmas not only for the radiologist, but also for the pathologist and surgeon. Arteriography is helpful in the diagnosis of these difficult cases, which cannot be diagnosed with certainty by the combined data from plain radiographs and histologic material. Since therapy is depen dent on the specific diagnosis, and unnecessary radical surgery has been performed in the past for benign disease, the addition of arteriographic data may confirm or refute a diagnosis and be quite helpful to the patient and...