This article deals with the problem of gastro-intestinal bleeding due to aorto-enteric fistulisation. Four such cases are presented, with connection to different parts of the gastro-intestinal tract, in the thorax and the abdomen. An until now unpublished localisation, that into the coecum, is presented. The description of the symptomatology and a survey of the literature are given. The importance of an existent time interval between the first and the fatal, last hemorrhage is emphasized, an interval thatallows life saving corrective aortic surgery.