Figure 1. This is a relatively straightforward osteochondrama that requires a type I (supracetabular) resection.
Figure 2. This extensive chondrosarcoma required a more extensive type I resection with a partial sacrectomy.
Figure 3. This acetabular chondrosarcoma was controlled with a type II periacetabular reconstruction with an allograft and hip replacement.
Figure 4. This Ewing's sarcoma in the iscium required a type III infra-acetabular resection with a periacetabular component. This was cryo-preserved and re-implanted into the patient with good result.