RESUMEN
Malignant tumors of the small bowel are uncommon by comparison with those in other parts of the gastrointestinal tract. Adenocarcinomas account for about half of the malignant tumors of the small intestine, which account for 1% to 2% of the gastrointestinal neoplasma. Small-bowel tumors are often asymptomatic and without clinical significance, and later became symptomatic and are eventually fatal. Patient's with regional enteritis, especially those who have had segments of the intestine surgically by passed, have an increased incidence of small-bowel cancer. The author experienced a case of an adenocarcinoma at the jejunostomy site (Braun anastomosis) which was treated by using a B II type subtotal gastrectomy for stomach cancer. That case of a jejunostomy site adenocarcinoma is reported and the literature on small-bowel malignancy is reviewed.