Amputation, Rotationplasty, Joint replacement surgery, Limb salvage surgery, Soft tissue sarcoma, Nerve sheath tumor, U...ndifferentiated pleomorphic sarcoma, Rhabdomyosarcoma, Bone cancer, 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, Liposarcoma, Soft tissue tumor