Fig. 2

Abdomen and pelvis computed tomography showed a 14.4 cm × 7 cm mass lesion (a, arrowhead) at the lateral side of duodenal second portion and caused lumen narrowing (a, arrow). The distended stomach is suggested to have gastric outlet obstruction. Pneumatosis was found at esophagus (b, arrow), stomach (c, arrowhead) and the bulb (d, arrow). The inflated air also entered the portal system (c, arrow)