50.0 MB (4.9 MB compressed)
5079 x 3441 pixels
42.9 x 29.2 cm ⏐ 16.9 x 11.5 in (300dpi)
DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Nasal polyp. View of a shiny growth inside a nostril (centre). This is a nasal polyp, a benign growth that projects on a stalk from mucous membranes. Polyps are commonly found in the nose, intestine, larynx or cervix. Nasal polyps are said to be caused by the irritants in tobacco smoke; they are often found in people with allergic rhinitis. They can cause an obstruction, chronic infection and discharge. Polyps are generally removed by surgical excision.
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