A rare sarcoma that arises from the vagina. This category includes low grade endometrioid stromal sarcoma and undifferentiated vaginal sarcoma. The disease is Monarch Disease Ontology identifier MONDO_0003313 (endometrioid stromal sarcoma of the vagina). Also known as: endometrioid stromal sarcoma of vagina, vagina endometrioid stromal sarcoma.