Imaging Study Of The Originating Site Of Primary Sinonasal Inverted Papilloma

Objective:To study the imaging value of the origin of primary sinonasal inverted papilloma.Methods:Retrospectively analyzed CT and MRI findings of 52 cases of SNIP confirmed by pathology.Compared the predicted sites by imaging findings with pathology results.Results:Theactual tumor attachment site in 40.4% of all patients accorded with the CT findings,MRI and combination CT plus MRI accurately predicted the SNIP originating sites in 60.0% and 75.0% of all patients separately.The positive rate of MRI and combination CT plus MRI was consistent with the surgical result by Chi-square test,the sensitivity of combination CT and MRI(86.7%,39/45)was superior to that using MRI alone(83.8%,31/37).Conclusion:Preoperative combination of MRI and CT provides a better option to accurately predict the SNIP originating site,and thus may facilitate accurate and complete excision of the SNIP.