Malignant mixed mesodermal tumor of uterus
Malignant mesodermal mixed tumor of the uterus originates from the most poorly differentiated endometrial stromal tissue among the derivatives of the Müllerian ducts. It can differentiate into myxoid tissue, connective tissue, cartilage tissue, striated muscle tissue, and smooth muscle tissue. It can contain both malignant epithelial components and malignant stromal components, i.e., cancer and sarcoma components. Homologous malignant Müllerian mixed tumor: Both sarcoma and cancer components are derived from the original tissue components of the uterus. Heterogeneous malignant Müllerian mixed tumor: The sarcoma contains tissue components other than the uterus, such as striated muscle, cartilage, bone, etc.