Increased expression of epithelial‐mesenchymal transition markers associated with recurrence of sinonasal inverted papilloma

Key points Sinonasal inverted papilloma (SNIP) is a benign epithelial proliferative disease with a high recurrence rate. The role of epithelial‐mesenchymal transition (EMT) in the pathogenesis of SNIP remains unclear. EMT marker expression is elevated in SNIP tissues and is associated with its recurrence.