Pelvic tumor surgery, Limb salvage surgery, Sacrectomy, Fracture treatment, Tumor biopsy, Surgical stabilization of met...astatic bone cancer, Spine reconstruction, Amputation, Bone metastasis surgery, Prophylactic surgery, Spinal fusion, Tumor resection, Spondylolisthesis surgery, Hemipelvectomy, Vertebral column resection, Spine procedure, Spinal stabilization surgery, Cancer treatment, Surgical biopsy, Spine decompression, Spine tumor surgery, Bone biopsy, Tumors and masses, Chondrosarcoma, Soft tissue sarcoma, Cancer of unknown origin, Bone cancer, Pelvic sarcoma, Soft tissue tumor, Spinal cord injury, Spondylolisthesis, Metastatic colorectal cancer, Spinal abscess, Sarcoma, Spondyloarthritis, Metastatic breast cancer, Osteosarcoma, Spondylosis, Spinal metastasis, Cancer, Spondylolysis, Spondylotic myelopathy, Bone metastasis, Spinal tumor, Chordoma, Pathologic fracture, Pelvic bone tumor, Spinal fracture, Metastatic melanoma, Spinal stenosis