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