45.8 MB (5.3 MB compressed)
4000 x 4000 pixels
33.8 x 33.8 cm ⏐ 13.3 x 13.3 in (300dpi)
EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
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Nasal polyp surface. Coloured scanning electron micrograph (SEM) of the surface of a nasal polyp, a growth that has developed from the mucous membrane that lines the nose. The surface of the polyp is irregular and is composed of cells of varying shapes and sizes. Polyps can result from chronic sinusitis (inflammation of the sinuses), rhinitis (inflammation of the nasal mucosa) or allergies. In most cases they are harmless, although they may hinder breathing and restrict the sense of smell. Polyps may also occasionally become cancerous, and so they are often removed surgically or by cauterization (the application of heat). Magnification: x125 at 6x7cm size.
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