label: Uterine Corpus Undifferentiated Sarcoma
label_lc: uterine corpus undifferentiated sarcoma
description: A rare, high grade sarcoma that arises from the endometrial stroma or myometrium without a specific type of differentiation. It was previously also known as high grade endometrial stromal sarcoma. In 2014, high grade endometrial stromal sarcoma was reclassified and is currently considered a distinct and rare neoplasm. Undifferentiated uterine sarcoma has a worse prognosis.