Abstract
We described the pathological conditions, clinical features, definitive diagnostic methods, and other features of intestinal tuberculosis, CMV enterocolitis, and amebic colitis, whose incidences are high in patients with chronic infectious enterocolitis, focusing mainly on colonoscopic diagnosis. These diseases have no specific clinical symptoms, and colonoscopy plays a very important role in their diagnosis. These diseases may be suspected on the basis of colonoscopic findings, and examinations specific to each disease are then performed, which frequently leads to definitive diagnosis. Intestinal tuberculosis is characterized by specific deformations, atrophic scars, and circular ulcers of the right-sided colon including the ileocecal area. In some cases, diagnostic imaging of the chest becomes is essential for diagnosis. CMV enterocolitis mostly occurs in immunocompromised patients, and has no particular sites of occurrence. Although it is frequently characterized by punched-out ulcers, it can exhibit various types of ulceration. Amebic colitis most commonly occurs in the cecum and rectum, and multiple ulcers accompanied by surrounding protrusions or redness are characteristic of it. CMV enterocolitis and amebic colitis frequently exhibit various concomitant ulcers.
