Traumatic osteolysis is a group of syndromes where bone and articular surfaces adjacent to a joint are rapidly fragmented and dispelled into the joint cavity as detritic fragments of bone and cartilage as a result of subchondral insufficiency fracture. Osteomalacia and osteoporosis are precursors. It is most common in middle-aged and older women. Sites involved are the femoral head, humeral head, pubis, and the knee. Patients present with joint pain. Most of the affected area disappears in time. The residual bone shows granulation tissue and impacted portions of detritic bone. Patients with traumatic osteolysis usually require total joint replacement.