ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Crohn's disease research. Coloured coronal magnetic resonance imaging (MRI) scan of the abdomen of a 37-year-old man with Crohn's disease. Various contrast media have been injected to highlight different parts of the digestive system, including the small intestine, the liver, and the mesenteric arteries. Crohn's disease causes inflammation, thickening, and ulceration of the intestinal tract. Its cause is unknown. Symptoms include abdominal pain, diarrhoea and weight loss.
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