MONDO_0016262 (leiomyosarcoma of the corpus uteri) is an aggressive malignant smooth muscle neoplasm, arising from the uterine corpus. It is characterized by a proliferation of neoplastic spindle cells. Also known as: Uterine Leiomyosarcoma, body of uterus leiomyosarcoma, corpus uteri leiomyosarcoma, leiomyosarcoma - uterus, leiomyosarcoma of body of uterus, leiomyosarcoma of corpus uteri, leiomyosarcoma of the body of uterus, leiomyosarcoma of the uterine body.