An infiltrating malignant tumor characterized by the presence of atypical cells with myoepithelial differentiation. Representative examples include malignant breast myoepithelioma and salivary gland myoepithelial carcinoma. The disease is Monarch Disease Ontology term MONDO_0003158 (malignant myoepithelioma). Also known as: myoepithelial carcinoma, myoepithelioma, malignant.