Head and Neck Imaging

Angiomatous polyp

vascular compromised nasochoanal component of a antrochoanal polyp or sphenochoanal polyp. Because of the compression of the feeder vessels in the polyp, a sequence of dilatation and stasis of feeder vessels, oedema, infarction and neovascularization is set up. This may lead to total necrosis or more often to an angiomatous polyp (see antrochoanal polyp (VI:2), Fig. 2; sphenochoanal polyp (VI:2), Fig. 1). The term 'angiomatous polyp' is sometimes also used for a vascularized and fibrosed nasal polyp, presumed to be the response to minor trauma, but little can be found about this in the literature.

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