Radiology of colonic interposition and its associated complications.

A retrospective review of the medical records, pathology reports, and radiographic studies of 81 patients who had undergone colonic interposition was undertaken, with special attention to postoperative complications. Both early (within 30 days postoperatively, 81 patients) and late (later than 30 days postoperatively, 57 patients) complications were reviewed. Early findings included anastomotic narrowing (18 patients), anastomotic leak (13), aspiration (11), and ischemic necrosis of the colon (3). Late findings included aspiration (9 patients), anastomotic strictures (8), gastric stasis (6), redundancy and tortuosity of the colon (5), anastomotic ulcers (4), gastrocolic reflux (3), and gastroesophageal reflux into the residual esophagus (2).