Simultaneous gastroscopy and colonoscopy for the diagnosis of gastrojejunocolic fistula.

Gastrojejunocolic fistula is an unusual, late complication of gastroenterostomy. Patients can present with symptoms of a fistula 20 years or more after their original gastric surgery. Establishing the diagnosis of gastrojejunocolic fistula is difficult because it has nonspecific symptoms on admission. The most frequently used diagnostic tools are barium enema and endoscopy. We herein report the case of a 60-year-old man with gastrojejunocolic fistula. We performed simultaneous gastroscopy and saw the tip of the colonoscope emerging through the gastrojejunostomy stoma.