Internal hemipelvectomy. A, Anteroposterior radiograph. Arrows point to lytic lesion. B, MR image shows osteosarcoma in 57-year-old man. C, Extensile approach is used, and external iliac vessels, femoral nerve, and spermatic cord are isolated. D, Hemipelvis has been removed. All major neurovascular structures were protected. E, Resected specimen. F, Postoperative anteroposterior radiograph. SEETECHNIQUE 24.11.