ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Gastric bypass. Coloured frontal X-ray of the digestive system of an obese 50-year-old man (weighing 125 kilograms) who has had a gastric bypass form of bariatric (weight-loss) surgery). The oesophagus (upper left) has been connected to the intestines (lower right). The results of this surgery are being examined on this X-ray using a contrast medium (white) such as barium (in a 'barium meal) that is opaque to X-rays.
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