RT Journal Article SR Electronic T1 Changes in the bidirectional sodium flux across the intestinal mucosa in Crohn's disease. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 201 OP 204 DO 10.1136/gut.16.3.201 VO 16 IS 3 A1 R Allan A1 D M Steinberg A1 K Dixon A1 W T Cooke YR 1975 UL http://gut.bmj.com/content/16/3/201.abstract AB Bidirectional sodium flux across the intestinal mucosa was measured in a group of 10 patients with Crohn's disease treated in the past by panproctocolectomy with ileostomy and compared with a similarly treated group of 11 patients with ulcerative colitis. All of them were in good health at the time of the study and a recent radiological examination of the small intestine was normal. A significant reduction in bidirectional sodium flux was found in those patients with Crohn's disease and suggests that the intestinal mucosa is involved to a greater extent than can be judged by radiological appearances alone. This adds weight to the concept that Crohn's diseases is a diffuse rather than a focal lesion of the gastrointestinal tract.