The radiologists are quite convinced there's no evidence of malignancy. A more recent MRI confirmed the fracture and AVN . Would you first take a bone biopsy from the acetabular region to be sure it's no metastasis. Your help in this case would be most appreciated. If you click the thumbnail images, you will get a larger, more detailed view.
Investigation suggests the anal cell carcinoma probably is cured.
I would put more emphasis on quality of life in this patient. Prolonged tibial traction in the presence AVN of head of femur and central dislocation will lead to no where. In addition it may cause complications such as bed sores, rapid loss of bone and muscle mass, hypostatic pneumonia, deep vein thrombosis and joint stiffness. I would suggest bilateral total hip arthroplasty for this patient. On the right side he may require additional acetabular reconstruction.