Colosalpingeal fistula with pneumosalpinx secondary to diverticular disease.

A postmenopausal woman with abdominal pain underwent CT, with the rare finding of pneumosalpinx produced by colosalpingeal fistula from diverticulitis. Though the burden of diverticular disease is increasing globally, salpingoenteric fistulas remain a serious and under-characterized complication, often only discovered during surgery. Identification of pneumosalpinx, a rare specific imaging finding secondary to this uncommon fistula, aids the radiologist in prospective recognition of this entity and expedites definitive treatment.