Hemipelvectomy, Amputation, Rotationplasty, Sacrectomy, Limb salvage surgery, Soft tissue sarcoma surgery, Vertebrectom...y, Chordoma, Soft tissue sarcoma, Nerve sheath tumor, Undifferentiated pleomorphic sarcoma, Rhabdomyosarcoma, Vertebral tumor, Bone cancer, Spinal tumor, Merkel cell carcinoma, Sarcoma, Chondrosarcoma, Solitary fibrous tumor, Malignant peripheral nerve sheath tumors, Bone tumor, Bone metastasis, Ewing sarcoma, Angiosarcoma, Synovial sarcoma, Myxofibrosarcoma, Epithelioid sarcoma, Dermatofibrosarcoma protuberans, Leiomyosarcoma, Osteosarcoma, Pelvic bone tumor, Liposarcoma, Pancoast tumor, Soft tissue tumor