Figure 3
From: A rare myoepithelioma of the sinonasal cavity: case report
Tumour is composed of small and/or medium spindle shaped cells, differently interlaced, with eosinophilic cytoplasm, that occur in sheets or swirls and have round to oval nuclei with finely dispersed chromatin. Stroma is myxomatous. Myoepithelial cells stain strongly positive for Calponin (40×).