Crohn's disease in Japan: The Japanese Research Committee for Crohn's Disease.

Sixty four cases of Crohn's disease were diagnosed. From our resluts reported here, the following conclusions were confirmed: 1) Crohn's disease as reported in Western countries certainly occurs among Japanese, too. 2) The most characteristic feature of Crohn's disease in Japanese patients was a long longitudinal ulcer along the mesenteric attachment of the small intestine, in addition to a cobblestone appearance. 3) In establishing the diagnosis of Crohn's disease, it was most important to distinguish Crohn's disease from intestinal tuberculosis.