Uterine tumors with mixed epithelial and mesenchymal elements.

The clinical and pathologic features and the differential diagnosis of uterine tumors containing mixed epithelial and mesenchymal elements are reviewed. The malignant mullerian mixed tumor (MMMT) is the most common neoplasm in this group, which also includes the mullerian adenofibroma and adenosarcoma, endometrial stromal neoplasms with focal epithelial differentiation, uterine tumors resembling ovarian sex cord tumors, and adenomyomas, including the atypical polypoid adenomyoma.