This book presents our experience in the operative treatment of bone and soft-tissue tumors arising in and around the pelvis, from 1970 to 1999 in the Department of Orthopedic Surgery at the Niigata University Medical Hospital. Histological diagnoses included both benign and malignant tumors. Surgical plan ning was difficult to perform in our early experience in operative treatment, when only angiography and barium enemas were in use. In the meantime, computed tomog raphy scanning and magnetic resonance imaging became available. Subsequent improvement in the quality of these images made...