DR MOURAD BOUDIAF / ISM / SCIENCE PHOTO LIBRARY DR MOURAD BOUDIAF / ISM / SCIENCE PHOTO LIBRARY
Colon polyp. Coloured 3D computed tomography (CT) scan of a sessile (non-stalked) polyp in the colon (large intestine) of a patient. Polyps are benign (non-cancerous) growths that arise from mucous membranes. Although benign, polyps are generally removed surgically as their growth may obstruct the passage of food, and some polyps may turn cancerous over time.
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