NCIt definition : A malignant mesenchymal neoplasm that affects the uterine corpus and rarely the ovaries,
cervix, vagina, and peritoneum. In the uterine corpus it is classified as low-grade
or high-grade endometrial stromal sarcoma. In the remainder of the anatomic sites,
it is classified as low-grade endometrioid stromal sarcoma.;
Alternative definition : CDISC: A malignant, mesenchymal tumor of the uterine stroma.;