prostate sarcoma (Monarch Disease Ontology term MONDO_0002854) is a rare malignant soft tissue neoplasm that arises from the prostate gland. Representative examples include leiomyosarcoma, rhabdomyosarcoma, and stromal sarcoma. Also known as: prostate gland sarcoma, sarcoma of prostate, sarcoma of prostate gland, sarcoma of the prostate.