title: Choanal and angiomatous polyps of the sinonasal tract.
abstract: Choanal and angiomatous polyps can be distinguished from ordinary sinonasal polyps by either a distinctive clinical presentation (choanal) or the histopathologic appearance (angiomatous). Nearly all choanal polyps arise within paranasal sinuses, with the antrochoanal polyp the most common. The angiomatous polyp is most often a secondary change in a choanal polyp and can be mistaken for vascular neoplasms, eg, angiofibroma.
authors.affiliation: Dept of Pathology, University of Texas M.D. Anderson Cancer Center, Houston 77030.
authors.forename: J G
authors.initials: JG
authors.lastname: Batsakis
authors.forename: N
authors.initials: N
authors.lastname: Sneige
mesh_terms: D006391:Hemangioma / Q000473:pathology*; D006801:Humans; D009298:Nasal Polyps / Q000473:pathology*; D010255:Paranasal Sinus Neoplasms / Q000473:pathology*; D011127:Polyps / Q000473:pathology*