ETV6 and nasal cavity and paranasal sinus carcinoma: Morphological characterization of the ETV6-fusion positive tumors revealed two different phenotypes: (1) tumors indistinguishable from (mammary-analogue) salivary gland secretory carcinomas which have been classified as primary sinonasal salivary-type secretory carcinomas [14, 15], thus adding to the list of salivary-type sinonasal carcinomas, and (2) tumors that belong to the spectrum of low-grade tubulopapillary adenocarcinoma and are distinct from secretory carcinomas, but harbor the same ETV6 gene fusion [16].