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(A) Epithelial-myoepithelial carcinoma with high-grade transformation has a component of low-grade epithelial-myoepithelial carcinoma (bottom left) and a component of high-grade adenocarcinoma with nuclear pleomorphism and necrosis (top right). (B) Epithelial-myoepithelial carcinomas sometimes exhibit cellular anaplasia of the myoepithelial cell component.
