Type of Preparation: Histology Magnification: High Clinical History: 68 year old woman with postmenopausal bleeding and an enlarged uterus on exam Interpretation: Other Malignant Neoplasms: MMMT (carcinosarcoma) Cytomorphologic Criteria: Histologic section of the endometrial MMMT has both a spindle cell sarcomatoid component and an adenocarcinomatous component. The cytomorphologic features of the tumor are similar to those displayed in the cervical cytology sample. Explanatory Notes: Recent clinicopathologic, immunohistochemical and molecular genetic studies support the classification of MMMTs as variants of carcinoma.