soft tissue sarcomaListen to pronunciation(…TIH-shoo sar-KOH-muh)A cancer that begins in the muscle, fat, fibrous tissue, blood vessels, or other supporting tissue of the body.More InformationSoft Tissue SarcomaEnlarge this image in new windowSoft tissue sarcoma forms in the soft tissues of the body, including the muscles, tendons, ligaments, cartilage, fat, blood vessels, lymph vessels, nerves, and tissues around joints. Search NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#