UNASSIGNED: Background:   @entity1179 ( @entity1179 ) is a benign lesion of the sinonasal tract. Clinical problems arise from expansive growth and @entity79 , a possible association with @entity5 and a tendency to recur. @entity50 ( @entity50 ) is the treatment of choice. The purpose of this study was to evaluate the theory of an elevated recurrence rate after secondary resection. @entity1 and Methods:   The retrospective analysis comprised 66 @entity1 , who were treated for @entity1179 at the University Clinic of Otorhinolaryngology Graz between 2000 and 2011. The mean follow-up was 33.85 months. 18 @entity1 were lost to follow-up. Results:   The study group consisted of 51 males and 15 females. 65 (98.5%) of which had been operated on purely endoscopic or via a combined approach. Recurrence was diagnosed in 14 cases (29.2%), on average 11.9 months after surgery, 71.5% of these in the first 12 months. The recurrence rate was significantly higher after revision surgery (50%) when @entity1 had been previously operated elsewhere as compared to primary resection (12%). The analysis also showed a significant increase in recurrences for Krouse stages 3 and 4. Conclusion:   The collected data confirms @entity50 as the best treatment option. Due to recurrences and malignant transformation, follow-up should be performed within 5 years postoperatively. We could statistically verify the prognostic value of Krouse's staging system. The elevated recurrence rate after secondary resection emphasises the significance of removing the @entity5 completely during the first surgery.

[The Problem of High Recurrence Rate in Endoscopic Revision Surgery for XXXX ].

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity5 :: ('MESH:D009369', 'Disease') :: ['malignancy', 'tumour'] @entity1179 :: ('MESH:D018308', 'Disease') :: ['IP', 'Inverted papilloma'] @entity79 :: ('MESH:D001847', 'Disease') :: ['bone destruction'] @entity50 :: ('MESH:D012851', 'Disease') :: ['Complete subperiostal/subperichondral removal via endoscopic sinus surgery', 'ESS']
@entity1179 :: (MESH:D018308,Disease) :: ['Inverted Papilloma']
