malignant mixed Müllerian tumorListen to pronunciation(muh-LIG-nunt mikst myoo-LAYR-ee-un TOO-mer)A rare type of tumor that is a mixture of carcinoma and sarcoma cells. MMMT usually occurs in the uterus. Also called MMMT.Search NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#