The development of colonic diverticula is common in developed countries and complications of colonic diverticulosis are responsible for a remarkable burden of the disease. The natural history and management of complicated and recurrent diverticulitis in young patients are still a matter of debate. Coloenteric fistula is a rare complication of diverticulitis in young adults. In this report, and utilising a case study, we will review the natural history, outcome and management of acute diverticulitis in the young.