[Double contrast hypotonic duodenography]

Double contrast hypotonic duodenography, as carried out by the authors, is a simple and rapid examination, suitable for routine use. At the same time, it includes a double contrast study of the oesophagus and stomach. The normal appearance is easily analysed, in particular that of the great caronculus. It is a selective examination of the duodenal outline, playing an essential role in the detection of lesions of the latter as well as in adjacent organs which may alter its shape. It provides only a suggestion as to aetiology and must therefore be completed, when appropriate, by other studies.