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Malignant myoepithelioma
This uncommon tumor is composed of malignant myoepithelial cells arranged in an infiltrative growing pattern and showing high mitotic activity. The cytology is that of a highly malignant tumor, the cells are rounded or elongated, marked nuclear atypia is present. Many bare atypical nuclei are usually visible. In some occasions cytoplasmic vacuolization, nuclear and cytoplasmic inclusions are found.
