[Diagnosis of duodenal ulcer by endoscopy (authors transl)]

A description is given of the endoscopic diagnosis of duodenal ulcer in 219 cases and follow-up control examinations in 58 cases. Endoscopic examination possesses distinct advantages over previously-used diagnostic procedures. Diagnosis by endoscopy is not only reliable, but gives, furthermore, exact information on localization and degree of activity of the duodenal ulcer. Moreover, it is possible to draw conclusions with regard to the prognosis on the basis of morphological criteria. This gain in information appears so valuable that nowadays endoscopy should not be omitted in the investigation of cases of duodenal ulcer.