Cancer treatment, Spinal fusion, Spine procedure, Hemipelvectomy, Amputation, Surgical biopsy, Bone biopsy, Prophylacti...c surgery, Sacrectomy, Bone metastasis surgery, Spine tumor surgery, Spine reconstruction, Spine decompression, Pelvic tumor surgery, Vertebral column resection, Tumor resection, Surgical stabilization of metastatic bone cancer, Tumor biopsy, Spondylolisthesis surgery, Spinal stabilization surgery, Limb salvage surgery, Fracture treatment, Spinal cord injury, Cancer, Spondylolysis, Spondylolisthesis, Chordoma, Spondyloarthritis, Soft tissue sarcoma, Spinal stenosis, Spinal fracture, Sarcoma, Chondrosarcoma, Osteosarcoma, Carcinoma of unknown primary, Bone metastasis, Bone cancer, Spinal tumor, Pelvic bone tumor, Stage 4 colorectal cancer, Pathologic fracture, Spondylotic myelopathy, Spinal metastasis, Stage 4 melanoma, Soft tissue tumor, Spinal abscess, Pelvic sarcoma, Tumors and masses, Spondylosis, Stage 4 breast cancer