[The 2nd saccoradiculography: changes in the post-radiculographic and postoperative radiological morphology (340 cases apropos of 2,292 files)].

A study was made of the files 2292 patients examined by sacco-radiculography with watersoluble contrast medium, of whom 340 had been subjected to a second examination. 284 of these had undergone surgery with good results during the interval between the two examinations. In 56 cases, repeat sacco-radiculography was carried out but no operation performed. In both groups of patients a semiological study was made of the radiological appearances to determine which were the effects of the contrast medium and which could be attributed to the operation. The paper concludes with a discussion of the problem of genuine and false albuminoachies of sacco-radiculography using meglumine locarmate (dimer-X).