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Minimally invasive endoscopic resection for the treatment of sinonasal malignancy: the outcomes and risk factors for recurrence.

PURPOSE: The role of minimally invasive endoscopic resection (MIER) in the treatment of sinonasal malignancy is controversial. Herein, we performed a retrospective review of a large case series of sinonasal malignancy patients treated with MIER aimed at evaluating the outcomes and identifying the risk factors for recurrence.

METHODS: Patients with sinonasal malignancy who underwent MIER from March 2000 to May 2015 were enrolled, and their clinical data were collected. The clinical outcomes were evaluated by determining the 5-year overall survival (OS) and disease-free survival (DFS). The predictive factors for survival and potential independent risk factors for recurrence were explored.

RESULTS: A total of 120 patients were enrolled, including 62 males and 58 females. The mean follow-up period was 51.4 (95% confidence interval: 44.0-59.1) months. The most frequent histological type was mucosal malignant melanoma. The positive margin rate was 19.2% (23/120). Seventy-one patients had the safety anatomic plane (SAP). Age ≥50 years, nodal metastasis, and not having the SAP were found to be predictive factors for survival, and absence of SAP was found to be an independent risk factor for recurrence.

CONCLUSION: Our study indicated that MIER is an effective and safe surgical procedure in appropriately selected patients. Tumor resection with a safety anatomic boundary is likely to lead to improved survival and decreased recurrence. However, a larger sample and long-term prospective observation are still required to establish the role of MIER in treatment of sinonasal malignancy.

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