Sinonasal Tract – Benign

This chapter covers some common, benign sinonasal entities (Schneiderian papillomas) and uncommon, emerging entities (respiratory epithelial adenomatoid hamartoma and sinonasal serous hamartoma). The latter likely represent benign adenosis-like tumor processes rather than hamartomas. Benign peripheral nerve sheath tumors and ectopic central nervous system entities are also discussed.