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