Hemipelvectomy, Sacrectomy, Amputation, Rotationplasty, Limb salvage surgery, Soft tissue sarcoma surgery, Vertebrectom...y, Vertebral tumor, Sarcoma, Bone cancer, Chondrosarcoma, Osteosarcoma, Bone metastasis, Soft tissue sarcoma, 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, Chordoma, Bone tumor, Soft tissue tumor, Pancoast tumor, Nerve sheath tumor