Giant sigmoid diverticulitis mimicking acute appendicitis.

Giant colonic diverticula are a rare manifestation of diverticular disease and there are fewer than 150 cases described in the literature. They may have an acute or chronic presentation or may remain asymptomatic and be found incidentally. As the majority (over 80%) of giant diverticula are located in the sigmoid colon, they usually present with left-sided symptoms but due to the variable location of the sigmoid loop, right-sided symptoms are possible. We describe the acute presentation of an inflamed giant sigmoid diverticulum with right iliac fossa pain. We discuss both the treatment options for this interesting condition and also the important role of computed tomography in the diagnosis and management of abdominal pain in elderly patients.