All patients with choanal polyps (CPs), operated upon over a 4 years period, with special emphasis on those with unusual sites of origin, were recorded to evaluate these cases and confirm the role of endoscopic sinus surgery and computed tomography. We reported 63 patients with CPs. Antrochoanal polyp (ACP) was the commonest variety constituting 84.1% of all cases. Those with unusual sites of origin constituted 15.9% of all cases, including ethmochoanal polyps (4 cases), CPs with double sites of origin (4 cases), and sphenochoanal polyps (2 cases).
We conclude that although ACP is the usual and most common variety of CPs, yet other types with unusual sites of origin do occur. Nasal endoscopy, and in some cases CT examination, are essential in all cases with CPs to identify the site of CP origin. Thus, complete removal of the polyp with its fixation site could be done and unnecessary surgery on unaffected sinuses could be avoided. Histopathological confirmation of the diagnosis should be considered in such cases.