Evaluation of disease extent with the Crohn's disease endoscopic index of severity. The four endoscopic variables described below are scored for each of the following locations: rectum; sigmoid and left colon; transverse colon; right colon; and ileum. Total score is divided by the number of locations explored (1–5). An additional 3 points are given if ulcerated stenosis is present, and a further 3 points are given if nonulcerated stenosis is present. CDEIS scores range from 0 to 44.
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