Amputation, Rotationplasty, Joint replacement surgery, Limb salvage surgery, Soft tissue sarcoma, Sarcoma, Chondrosarco...ma, Osteosarcoma, Bone metastasis, Nerve sheath tumor, Bone cancer, Merkel cell carcinoma, 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