The authors present a clinical case of a forty-nine-year-old man admitted to hospital because of a seven month history of diarrhoea. The patient had been submitted to partial gastrectomy twenty-two years ago due to peptic ulcer. The analytic study was compatible with malabsorption syndrome. The colonoscopic and radiological studies revealed the existence of two fistulas between the gastric-stump, the small intestine and the colon. The patient was submitted to surgery with resection of the fistulas and re-gastrectomy with trunk vagotomy and Roux-en-Y reanastomosis. The follow-up twelve months after surgery showed an asymptomatic subject with weight recovery who had resumed his professional activities without limitations.