A subtle mass effect is seen on the 2nd and 3rd portions of the duodenum on the upper GI series. On CT, a 6 cm mass is seen arising from the uncinate process of the pancreas. CT shows encasement and compression of the SMA and SMV. Because of its position below the common bile duct, it was not obstructing the duct (documented on ultrasound) so there was no jaundice and minimal changes in liver enzymes. The pancreas and therefore this mass were obscured on ultrasound because of overlying bowel gas.