비인강 혈관섬유종으로 오인된 혈관종성 상악동후비강폴립

Antrochoanal polyp is rare disease and its angiomatous change is very rare condition. Most of the angiomatous antrochoanal polyps are developed in young age and related with frequent recurrent unilateral epistaxis and nasal obstruction. Having similar radiological findings to nasopharyngeal angiofibroma, angiomatous antrochoanal polyps are easy to be misconceived nasopharyngeal angiofibroma. The author recently experienced a case of angiomatous antrochoanal polyp which had similar findings to nasopharyngeal angiofibroma in CT scan and MRI scan but had few vasculature in angiography. Eventually it was removed completely by Caldwell-Luc operation and diagnosis was made as a angiomatous antrochoanal polyp through the pathologic results. (J Clinical Otolaryngol 2001;12:89-94)