The lesion in Dieulafoy's disease consists of a submucosal ectatic artery in the gastrointestinal tract. It is larger than the vessels usually in that area. It can occur in any part of the GI tract, although most frequently it is in the stomach.1 The protuberant artery causes brisk bleeding with little or no surrounding ulceration. The aetiology of the ectatic vessel and the cause of bleeding is unknown.
This is a companion discussion topic for the original article at https://patient.info/doctor/dieulafoy-lesion.htm