Fig. 1

a CT scan revealed thickening of the jejunal wall at multiple locations in the upper abdomen, with a slightly denser outer layer, exhibiting ‘target sign’ changes, along with mesenteric edema. b CTA showed the mesenteric vessels filled and displaying a ‘comb sign’ change. c During laparoscopic observation, a significant amount of turbid-brown fluid was observed in the abdominal cavity, with the portion of the bowel covered by the greater omentum appearing black. d Laparotomy revealed that the jejunal intestine, located approximately 10 cm from the Treitz’s ligament, was black and lacked peristalsis, spanning approximately 30 cm in length