Management of sinonasal inverted papillomas and comparison of classification staging systems.

Background: The aim of this study was to describe treatment results in patients with sinonasal inverted papilloma and to compare recent classification staging systems.

Methods: We performed a retrospective study of 79 patients with primary paranasal sinus inverted papilloma from 1978 to 2008.

Results: The median age at diagnosis was 59 years.