Abstract
Four cases of Crohn's disease involving the large bowel (two definite and two probable cases of Crohn's disease) are studied with special reference to the characteristics on X-ray findings and endoscopic findings. In one of the probable cases, longitudinal ulcer was found at the transverse colon during the clinincal course. In one of the definite cases, clinical manifestations have fulfilled the clinical standards of Crohn's disease one by one during the clinical course. In the rest of the cases, X-ray and endoscopic findings have revealed no change from their onsets. We think it is inappropriate to make the diagnosis of Crohn's disease at the first medical examination. Therefore, if we come upon any cases of inflammatory or infectious bowel disease, we should give our mind to Crohn's disease and observe the X-ray and endoscopic findings for a long time.
