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