Sinonasal (Schneiderian) papillomas are benign neoplasms that arise in the sinonasal tract. Since their initial descriptions, sinonasal papillomas have triggered debate regarding their classification, etiology, rate or predictors of malignant transformation, and other issues. While significant strides have been made in recent years, there are still aspects of sinonasal papillomas that remain unclear even now. This review will serve to update the practicing pathologist on the current understanding of sinonasal papillomas.
Keywords: Cylindrical cell papilloma; Fungiform papilloma; Inverted papilloma; Oncocytic papilloma; Schneiderian papilloma; Sinonasal papilloma.