Colovaginal and colo-ovarian fistulas are rare entities that could be attributed to diverticular disease after an episode of acute diverticulitis. Τhey could initially be manifested with symptoms that lead patients to the gynecologist. Gynecologists should consider them in the differential diagnosis, especially after recurrent episodes of sinusitis. We report the case of a 51-year-old woman with a colovaginal and a colo-ovarian fistula due to subclinical diverticular disease, which should be involved in the differential diagnosis in those complicated fistulas, even if the patient had never before a clinical episode of acute diverticulitis or known diverticular disease, and a successful surgical approach.

Giant colonic diverticulum (GCD), defined as diverticulum larger than 4 cm, is a rare entity. It is generally a manifestation of colonic diverticular disease and can have dramatic complications such as perforation, abscess, volvulus, infarction and adenocarcinoma. This report documents the case of a 63-year-old man coming to the Emergency Department with acute abdomen due to a perforation of a GCD. In the plain abdominal X-ray the 'Balloon-sign' was revealed, computed tomography scan and Hartmann's procedure were performed. Acute abdomen can occur as a manifestation of a complication of a GCD, and this report highlights the fact that GCD should be considered for patients with a high risk of diverticular disease and abdominal pain.