Extranasopharyngeal Angiofibroma of the Natural Ostium of Maxillary Sinus.

Extranasopharyngeal angiofibroma which occurs in all head and neck regions is extremely rare. Unlike most angiofibromas which show nasal congestion and recurrent epistaxis as their symptoms, extranasopharyngeal angiofibromas (ENAF) may lead to various symptoms depending on their location. Nasal septum is the most frequent site of origin of ENAF. No study of ENAF originating in natural ostium of maxillary sinus has been reported. We present a case of 27-year-old male who has extranasophar- yngeal angiofibroma arising from the natural ostium of maxillary sinus in an adult patient whose symptom was right sided nasal obstruction. With this study, although uncommon, angiofibroma should be considered as a differential diagnosis in patient with mass lesion in the middle nasal meatus.