Primary jejunal ulcer is extremely rare and only a few cases have been reported in the literature. Flörcken1has recently collected and reported the data in twelve cases. With the exception of these isolated instances, gastrojejunal ulcer is the common lesion which results secondary to operative procedures undertaken for the relief of gastric or duodenal ulcer and is the one which is the subject matter of the present report. While the reported incidence varies with the skill of the surgeon and the completeness of the follow-up system, gastro-enterostomy furnishes by far the largest number. The causes given for the development of this complication are: (1) errors in surgical technic; (2) pressure by anastomotic clamps; (3) foreign body inclusions, such as suture material, in the line of suture; (4) the existence of an inflamed duodenum or stomach at the time of operation; (5) an alteration in physiology brought about by