There are multiple definitions:

1. MusculoSkeletal Tumor Society(English)

   • APC, ASES, SST, VAS
   • Musculoskeletal system, Oncology, Organizations (scientific), Shoulder and other joints
   • https://doi.org…JS.RVW.23.00061

2. metastatic spine tumor surgery(English)

   • focuses on decompressing the spinal cord, stabilizing the spine, and controlling local pain rather than curing the underlying cancer
   • HA, PEEK
   • Spine (or spinal cord), Oncology, Surgery, Terminal / palliative care
   • https://doi.org…neu.2021.01.059