Angiomatous Nasal Polyp: A Condition Difficult to Diagnose

Introduction: Angiectatic nasal polyp (ANP) is a rare entity of inflammatory sinonasal polyp, constituting 4 to 5% of all nasal polyps.1 An angiomatous polyp originates from a sinochoanal polyp, either an antrochoanal or a sphenochoanal polyp. Their hallmark feature is extensive vascular proliferation and ectasia with deposition of pseudoamyloid and the presence of atypical stromal cells. This pseudoneoplastic entity is the result of extensive reactive and reparative changes in inflammatory SNPs. Case report: We came across an interesting case of angiomatous nasal polyp. CT finding also supported the clinical impression of neoplastic mass but repeated biopsies were negative for malignancy. The mass was excised by lateral rhinotomy and the final impression of angiectatic nasal polyp was made. Discussion and conclusion: Only few studies have been done on this topic and literature is also scant. Thus, awareness of their existence is of considerable importance. Differential diagnosis includes angiofibroma, malignancy, inverted papillomas and hemangiomas.