Right colon loop: a potential pitfall for total colonoscopy

A right colon loop can occur during total colonoscopy. A light on the anterior abdominal wall in the right lower quadrant and a fluoroscopic view may imply that the tip of the colonoscope is in the cecum. The right colon loop can be documented by roentgenograms and the injection of a radioopaque solution. An arrest in embryological development with overdistension with air accounts for the right colon loop. An unrecognized right colon loop could account for a failure to see a cecal carcinoma.