Abstract
Ulcerative colitis and Crohn's disease are idiopathic, chronic disorders and are called “inflammatory bowel disease (IBD)” in the narrow sense. Diagnoses are made based on diagnostic criteria. Imaging modalities play important roles in the diagnosis of IBDs ; however, a dilemma exists in that images of other disorders are similar. Along with the remarkable advances in therapeutic measures, the need for an exact diagnosis is increasing. Especially, misdiagnosis of infectious disorders such as Camplylobacter enterocolitis, amoebic colitis, intestinal tuberculosis, and Yersinia enterocolitis must be avoided. In addition, discrimination between ulcerative colitis and Crohn's disease should be made with caution. In this article, endoscopic differential diagnoses between IBD and other disorders are described.
