Knee replacement, Hip replacement, Hemipelvectomy, Stem cell therapy, Bone biopsy, Pelvic tumor surgery, Partial knee r...eplacement, Joint replacement revision, Surgical stabilization of metastatic bone cancer, Rotationplasty, Hip core decompression, Soft tissue sarcoma surgery, Knee replacement revision, Hip replacement revision, Direct anterior approach hip replacement, Hip fracture surgery, Hip decompression, Robot-assisted knee replacement, Osteoarthritis, Avascular necrosis, Hip dysplasia, Sarcoma, Arthritis, Bone cancer, Chondrosarcoma, Osteosarcoma, Hip fracture, Bone metastasis, Soft tissue sarcoma, Pelvis fracture, Osteoid osteoma, Pelvic bone tumor, Hip arthritis, Ewing sarcoma, Liposarcoma, Synovial sarcoma, Myxofibrosarcoma, Rhabdomyosarcoma, Chordoma, Osteochondroma, Pathologic fracture, Bone tumor, Failed total knee replacement, Knee arthritis, Failed total hip replacement, Benign bone tumor, Periprosthetic fracture, Infected total knee replacement, Infected total hip replacement, Fibrosarcoma, Femoral nonunion, Osteosclerotic myeloma, Giant cell tumor, Prosthetic joint infection, Aneurysmal bone cyst