The double-contrast upper gastrointestinal examination in the Japanese style.

An experience with over 2,000 Japanese-style double-contrast upper gastrointestinal examinations is presented. Results indicate that, in combination with the conventional single-contrast films, the double-contrast examination of the stomach greatly increased the yield and accuracy of the radiographic procedure. The double-contrast study appears to have particular applicability in detecting lesions which do not greatly elevate or depress the surface of the stomach, such as early carcinomas, shallow ulcers, ulcer scars, small polyps and other similar mucosal abnormalities.