A malignant mesenchymal neoplasm arising from the wall of the uterine corpus (uterine body). The most representative examples are leiomyosarcoma and endometrial stromal sarcoma. The disease is MONDO_0005210 (uterine corpus sarcoma). Also known as: body of uterus sarcoma, corpus uteri sarcoma, sarcoma of body of uterus, sarcoma of corpus uteri, sarcoma of the body of uterus, sarcoma of the corpus uteri, sarcoma of the uterine body, sarcoma of the uterine corpus.