[Uncommon presentation of perforated colonic diverticuli].

Diverticulosis of the colon is common in the sigmoid, but much less so in the cecum, ascending or transverse colon. We report 2 patients who presented with clinical findings of perforated diverticulitis of the transverse and left colon. A 42- and a 46-year-old man underwent extended right and left hemicolectomies, respectively. The first patient ran an excellent postoperative course. In the second, in whom a double-barrelled colostomy was formed, the proximal colostomy had to be redone because of stomal retraction, but both stomata eventually were closed. On follow-up both patients are symptom-free. The diagnosis of diverticulitis with complications should be considered in patients who present with intra-abdominal masses. Preoperatively, the condition often cannot be differentiated from carcinoma.