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Obstructed bowel. Operation on the intestines (bowel) of a patient with an obstructed bowel. The condition involves a blockage of the intestines by objects ranging from constipated faeces to cancer. Two tumours (centre right) are blocking the bowel of this patient and causing the bowels to become bloated. The surgery is intended to remove the tumours. (KEYSTONE/SCIENCE PHOTO LIBRARY/DR M.A. ANSARY)