Nonspecific ulcer of the small intestine is one of the rare and particularly enigmatic diseases of the abdomen. Little is known of this intestinal lesion. The clinical picture is vague and confusing, making preoperative diagnosis almost an impossibility. The etiology is unknown. The histologic characteristics are a matter of record, but they give little indication of the pathogenesis of the lesion. Excellent papers have appeared in the literature tabulating the cases which have been reported and summarizing what is known of the disease.1This type of ulcer was first described in 1805 by Matthew Baillie; yet in 1947, when Evert, Black, and Dockerty1aat the Mayo Clinic made a study of the literature, they found a total of only 130 cases, including 14 from their own clinic. The purpose of this paper is to report five cases which were seen in the past three years in a city