Type of Preparation: Conventional 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: A three-dimensional cluster of epithelial cells with enlarged round nuclei, macronucleoli and moderate amount of finely vacuolated cytoplasm has features of adenocarcinoma. Granular debris consistent with tumor diathesis is noted at the edges of the cluster. Explanatory Notes: MMMT commonly exfoliate as poorly preserved malignant cells in cervical cytology samples. Only epithelial clusters may be found resulting in an overlap with endometrioid adenocarcinoma on the cytologic preparation. Follow-up: MMMT of endometrium