OBJECTIVE To evaluate the effect of endoscopic surgery for maxillary sinus inverted papilloma. METHODS From 2000 to 2011, 50 patients with maxillary sinus inverted papilloma were treated with intranasal endoscopic surgery or combined approach. Among them, 39 cases were primary and 11 cases were recurrent, which included 17 patients with Krouse stage IIand 33 cases with Krouse stage III. Different surgical approaches were selected according to the range and positions of the lesions. One case with severe atypical hyperplasia received postoperative radiotherapy. RESULTS All cases were followed up for 3-14 years, 7 cases recurred. All occurrence within 2 years after operation. Malignant change and death was found in 1 case. After operation, epiphora occurred in 2 cases, maxillary sinus labiogingival groove fistula occurred in 2 cases, facial numbness occurred in 4 cases and incision hemorrhage occurred in 1 case. All the complications were cured after appropriate treatment. CONCLUSIONS Naso-endoscopic surgery or combined approach is a safe, effective and microinvasive treatment for patients with maxillary sinus inverted papilloma. Accurate selection of suitable approach according to the range and positions of the lesions and correct management of the base of the tumor are critical to the success of the operation.

中文翻译：

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上颌窦内翻乳头状瘤的内镜手术

目的评价内镜手术治疗上颌窦内翻乳头状瘤的效果。方法2000年至2011年，对50例上颌窦内翻乳头状瘤患者行鼻内镜手术或联合入路治疗。其中原发性39例，复发性11例，其中Krouse II期17例，Krouse III期33例。根据病变的范围和位置选择不同的手术方法。一例严重的非典型增生患者接受了术后放疗。结果所有病例均获随访，随访时间3-14年，复发7例。术后2年内全部发生。1例发现恶性变化和死亡。术后发生外溢2例，上颌窦唇龈沟瘘2例，面部麻木4例，切口出血1例。适当治疗后所有并发症均得到治愈。结论鼻内镜手术或联合治疗是上颌窦内翻性乳头状瘤患者的一种安全，有效且微创的治疗方法。根据病变的范围和位置准确选择合适的方法以及正确治疗肿瘤的基础对于手术的成功至关重要。