Clinical Presentations, Surgical Management and Outcome of Sinonasal Inverted Papilloma

Sinonasal inverted papilloma (IP) also known as Schneiderian papilloma is one of the most intriguing pathology of nasal cavity and paranasal sinuses [1]. It is a benign epithelial neoplasm arising from the Schneiderian epithelium that lines the nose and paranasal sinuses [2]. Other names for this tumor include epithelial papilloma, Ringertz’s tumour, transitional cell papilloma, villiform cancer and Ewing’s papilloma [3]. It accounts for 70% of all sinonasal papillomas, remaining 30% are either exophyticpapillomas or columnar cell papillomas despite that it is not very common diseases (0.5-4% of all nasal and sinus tumours). However, IP attracts considerable interest because it is locally aggressive, has a high propensity to recur, and is significantly associated with malignant transformation-most frequently to squamous cell carcinoma in about 10-15% cases [4,5].