Abstract
Choanal polyps are conventionally divided into two groups, antrochoanal and sphenochoanal. The paper presents a series of 5 choanal polyps originating from posterior ethmoidal cells and protruding into the nasopharynx through the natural ostium of the posterior ethmoids in the superior nasal meatus. In two of these cases the polyps were bilateral, in three-unilateral. Two cases presented solitary ethmochoanal polyps (ECP) and posterior ethmoids as the only diseased sinuses. In the other three patients ECP was associated with polyps in the middle meatus, anterior ethmoids and maxillary sinuses.
Computerized tomography and nasal endoscopy allow correct diagnosis of ECP as well as differentiation between ECP and other types of choanal polyps in most but not in all the cases. Endoscopic sinus surgery through the superior nasal meatus with the use of a microdebrider is the method of choice in treatment of ECP.
