Review of 25 cases of inverted papilloma in 8 years

Abstract

Introduction: Inverted papilloma is an unusual benign tumor of the sinonasal tract, characterized by an important risk of recurrence and malignant transformation. Aim: Our objective is to describe the case series diagnosed with inverted papilloma of the sinonasal tract between the years 2002 and 2010. Material and method: A retrospective analysis of new cases of inverted papilloma of the sinonasal tract treated at our Hospital between the years 2002 and 2010. Results: 25 cases of newly diagnosed inverted papilloma presented in our institution. The symptoms had on average 2 years of evolution, being nasal obstruction and rhinorrhea the most frequent. Preoperative staging by computed tomography (CT) was performed in 15 patients. The endoscopic aproach was preferred as surgical approach. 56% of the patients corresponded to stage 2 of Krause classification. Median folow up was 29 months. During that period, 4 patients had recurrence, corresponding to 16% in our series. Half of these patients had dysplasia or atypia at the time of recurrence. 1 case of malignant transformation ocurred, which presented as an undifferentiated carcinoma. Conclusions: General characteristics were similar to those reported in international reports. In our setting, patients are diagnosed in advanced stages of disease, nevertheless, endoscopic approach is the preferred surgery method.