Look for the most common tumors:
Cytopathology of pleomorphic adenoma (Pap stain). It can usually be diagnosed by its typical fibrillary stroma (mesenchyme). Stromal cell nuclei are small. Myoepithelial cells are usually the predominant cell type, and can have various shapes but are usually more elongated than epithelial cells. Epithelial cells may have prominent nucleoli.