Sphenochoanal Polyp

A sphenochoanal polyp is a soft tissue mass originating from the sphenoid sinus and extending to the posterior choanae via the sphenoethmoidal recess. Compared with common nasal polyposis and antrochoanal polyps, reports of sphenochoanal polyps in the English literature are relatively rare. In this report, a 12-year-old boy who presented with persistent left nasal obstruction and rhinorrhea was diagnosed with left sphenochoanal polyp using computed tomography. The patient underwent powered instrument-assisted endoscopic sinus surgery and was symptom-free at the 1-year follow-up. We present this uncommon case to highlight that sphenochoanal polyps may occasionally be encountered and need careful evaluation before operation.