Objective: We report a rare case of antro-choanal polyp turned out to be an inverted papilloma. Method: A female patient presented with an antro-choanal polyp appearing in the oropharynx. The histology was inverted papilloma. The world literature review revealed only four cases have been reported. We discuss the clinical picture, as well as the radiological and histological finding of this rare case. Conclusion: This aim of this article is to draw the attention that the simple appearance of an antro-choanal polyp can hide a sinister pathology. Introduction Antro-choanal polyp is one of the uncommon nasal polypi. It is believed to originate from the antral mucosa to the maxillary ostium; its direction of growth being posteriorly toward the choana and appearing in the oropharynx. 1,2,3,4,5,6,7 Conversely however,, inverted papilloma is one of the commonest nasal tumours. 9 The pathology of the antrochoanal polyp is thought to be an intramural cyst arising from the antral mucosa toward the maxillary ostium. 8 In this case report, we report a rare case of an antro-choanal polyp turned out to be an inverted papilloma. The histology, clinical picture as well as the radiological findings will be discussed. 10,11,12 Literature review revealed only four cases have been reported. 13,14 Case Report A 45-year-old female Caucasian, was referred to our department from her General Practitioner with a two day history of globus pharyngeous sensation and a five week history of bilateral nasal blockage. This lady smoked 15 cigarettes a day and her past medical history included left mastectomy and radiotherapy for breast cancer.Throat examination revealed a large polypoidal mass in the orophrynx hanging down from the nasopharynx (Fig.1).
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