[Double-contrast technique for diagnostics of the large intestine (author's transl)].

The results of 1300 radiographic examinations of the colon with the double-contrast method were reported. In preparation for the examination, only a laxative (cascara salax) was administered and the patient not permitted to eat. The importance of horizontal films was mentioned in particular. A malignant tumor in the colon was discovered in 137 cases. A malignant degeneration was established via histologic examination in 23 of the 152 patients with polypoid lesions. Juxtaposition of a malignant tumor and a polypoid lesion or a second carcinoma was discovered via radiological examination in 28 patients.