Cystic change in iliac acetabulum is commonly recognized as the one of the findings of degenerative arthritis. There were some cases who appeared to us that their cysts were in part responsible for their discomfort on hip. Curettage and bone grafting was performed for the treatment on 5 cases who had acetabular cyst without arthritic changes or with minimal arthritic changes. These cysts include intraosseous ganglion, solitary bone cyst, subchondral bone cyst and osteoarthritic cysts. The results were variable.
