Twelve cases of peritonitis due to sigmoid diverticulitis managed by minimal surgery are reported. Morbidity involved two cases of stenosing sigmoiditis on which sigmoid resection was successfully carried out. Although it is considered that radical surgery is the optimal solution, it is also recalled that the prime objective is to cure the peritonitis, so each case must be assessed carefully on its own merits since the condition is a complication of a benign disease and the risk of emergency sigmoid resections is by no means negligible.