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According to available evidence, these factors are still debated, and results are contradictory. In this multicenter retrospective study, we analyzed the clinical records of 130 patients who were surgically treated for sinonasal IP to evaluate the factors affecting recurrence and persistence of IP and compared the curative rates of different surgical approaches. Our analysis showed that IP recurrence is strongly related to specific risk factors including incomplete surgical removal, stage of disease, site of the lesion, surgical technique, and malignancy rate. In conclusion, the recurrence of IP may be affected by several risk factors; these factors must be carefully considered during clinical evaluation and especially during the follow-up of patients with IP.<\/jats:p>","DOI":"10.1177\/0145561319890454","type":"journal-article","created":{"date-parts":[[2019,11,28]],"date-time":"2019-11-28T06:40:12Z","timestamp":1574923212000},"page":"542S-548S","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":16,"title":["Endoscopic Resection of Sinonasal Inverted Papilloma: A Multivariate Retrospective Analysis of Factors Affecting Recurrence and Persistence"],"prefix":"10.1177","volume":"100","author":[{"given":"Antonio","family":"Minni","sequence":"first","affiliation":[{"name":"Department of Sense Organs, Sapienza Universit\u00e0 di Roma, Roma, 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