The sinonasal tract remains an epicenter of a diverse array of neoplasia. This paper discusses changes to the WHO classification system of tumors involving this area. In particular, seromucinous hamartoma, NUT carcinoma, biphenotypic sinonasal sarcoma, HPV-related carcinoma with adenoid cystic features, SMARCB1-deficient carcinoma, and renal cell-like adenocarcinoma are discussed.
Keywords: Adenoid cystic; Biphenotypical sinonasal sarcoma; Human papillomavirus; INI1; NUT carcinoma; Nasal; Seromucinous hamartoma; Sinonasal; Sinus; WHO.