Hip replacement, Knee replacement, Soft tissue sarcoma surgery, Arthroplasty, Peripheral nerve tumor surgery, Pelvic tu...mor surgery, Bone metastasis surgery, Bone reconstruction, Hip replacement revision, Knee replacement revision, Bone cancer, Soft tissue sarcoma, Bone metastasis, Sarcoma, Bone tumor, Pelvic sarcoma, Soft tissue tumor, Hip arthritis, Failed total hip replacement, Knee arthritis, Failed total knee replacement, Pelvic bone tumor, Periprosthetic joint infection