Abstract
The purpose of this study was to evaluate the clinical behavior of oncocytic Schneiderian papillomas in relation to the rate of malignant transformation and recurrences and to report the long-term results of the endoscopic endonasal treatment. A retrospective analysis was carried out on patients with oncocytic papilloma, endoscopically managed over the past 20 years, at 2 university centers following a uniform policy. Thirty-three patients were treated between November 1991 and December 2010. The mean follow-up period was 62 months. We observed 2 cases of persistence (6%) at the maxillary sinus level. Both of these patients underwent endoscopic surgical revision. Squamous cell carcinoma (SCC) was observed in 1 patient (3%). The endonasal endoscopic technique proved to be a safe and effective approach for the treatment of oncocytic papillomas. An oncocytic papilloma is not to be considered a negative prognostic factor in terms of malignant transformation or recurrence.
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