We are presenting two cases of obesity surgery. Both of our patients underwent laparoscopic Roux en Y Gastric ByPass. We have detected proximal jejunal tumors incidentally and treated these with wedge resection. Our first patient is fourty six years old female. She has diabetes and hypertension as a comorbidity. Her BMI 40,1. Prior to jejunal division stage, during searching the Treitz ligament, we had noticed a mass. It was on the antimesenteric surface of the proximal jejenum, 10 cm distal to the ligament of Treitz. Nodular shaped, smooth surfaced mass was one and half centimeter in diameter and purple color. The lesion is excized tangentially by using two endogia cartridges. Pathologic diagnosis was a gastrointestinal stromal tumor (GIST). The patient has been under our routine clinical follow up. Second patient is twenty eight years old otherwise healthy female. Her BMI was 58. At the same stage of the operation with the above mentioned patient, a one centimeter lesion was detected, five centimeter distal to the Treitz ligament. The lesion was on the antimesenteric border of the jejenum. It has salmonlike color, granular surface and the soft consistency. We perfomed a tangential resection of the lesion with a one blue lineer cutter cartridge. Pathologic examination was reported that was an ectopic pancreatic tissue. These cases imply that we may encounter incidental tumors at proximal jejenum during laparoscopic bariatric surgery which can be treated by a tangential tumor resection.