Nasal Polyp Originating from the Inferior Nasal Concha

Abstract

Almost all choanal polyps originate from the maxillary sinus and a choanal polyp (CP) originating from the inferior nasal concha (INC) is a rare entity.
A 56-year-old man presented to the ENT service with a one-month history of nasal mucus. On endoscopic examination, a polypoid mass completely obliterated the right nasal cavity and the middle nasal concha was normal. A computed tomography (CT) scan showed a soft-tissue opacity that filled the right inferior nasal concha without any sinus invasion and bony destruction. An endoscopic polypectomy was performed under local anesthesia and it was observed that the polyp originated from the right INC.
Histological analysis (H and E) showed that it was covered by squamous epithelium with pseudostratified respiratory epithelium and glandular epithelium remnants. As mentioned above, it was diagnosed as CP.
About two months after the operation, the INC endoscopic findings were normal.