Perforations of the colon and rectum during administration of barium enema. Six cases report. The authors have stated six cases of accidental perforation occurring during barium enema examination. They recall their principal modality of unexpected arrival, in particular: the type of nozzle used, the means of injecting the contrasting liquid, the role played by the pathological associated colon-rectum lesions. The diagnosis may be postponed especially when the perforation is under the peritoneal seat. The pain during or after the opacification as well as the rectorragies are the most frequent alarming symptoms observed. The prognosis is on the whole serious but is can be improved by a rapid and appropriate therapy.