[The manifestations of regional enteritis (Crohn's disease) in the stomach and duodenum (author's transl)].

Involvement of the stomach and duodenum is relatively rare, but produces distrinct radiological changes. In the stomach the antrum and pyloric portion are affected most frequently. Simultaneous involvement of the duodenum is common. Typical radiological changes consist of funnelshaped narrowing of the antrum, decreased motility of the wall of the stomach, cobblestone mucosa with flat ulcers, deformity of the pylorus and first part of the duodenum and stenosing lesions of the duodenum. If the gastro-duodenal changes occur together with the typical appearances in the jejunum, ileum and colon, then the diagnosis can be made by radiology alone.