Treatment results of sinonasal inverted papilloma: An 18-year study

Sham, C. L.; Woo, John K. S.; van Hasselt, C. Andrew; Tong, Michael C. F.
March 2009
American Journal of Rhinology & Allergy;Mar2009, Vol. 23 Issue 2, p203
Academic Journal
Background: This article reviews our treatment results of sinonasal inverted papilloma (SNIP) over the past 18 years. A retrospective observational study was performed. Methods: Fifty-six patients with SNIP seen between 1990 and 2008 with follow-up of >2 years were retrospectively analyzed. Results: Forty patients (71%) had primary endoscopic resection and 16 patients (29%) had endoscopic-assisted external approaches. Ten patients (18%) had small nasoethmoid residual disease resectable under local anesthesia in the outpatient department. Eight patients (14%) had recurrences requiring revision under general anesthesia, most of which were maxillary and frontal disease requiring additional external approaches. Comparing patients with and without a history of previous surgery (36% versus 64% of all patients), the former had a higher chance of requiring external approaches during the primary resection (45% versus 29%), a higher recurrence rate (45% versus 25%), and a higher chance of external approaches for revision (44% versus 22%). All the first recurrences were at the original tumor site. Eighty-nine percent of the first recurrences were diagnosed within the first 2 years postoperation. Conclusion: Thirty-two percent of our patients had recurrence after their primary resection. Recurrences in the nasoethmoid area are usually small and resectable endoscopically under local anesthesia in the outpatient department whereas those inside the maxillary and frontal sinuses are likely to require additional external approaches under general anesthesia. A minimum of 2 years of follow-up is recommended for the preliminary report on the treatment results of this condition. Lifelong follow-up is recommended for possible late recurrences and metachronous multifocal disease.


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