PMC5876451_01
(A) Axial and (B) coronal abdominal computed tomography showing duodenal intussusception with typical bowel-within-bowel sign or target sign.
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F1
Abdominal and pelvic computed tomography (CT) with contrast showed concentric loops of bowel with intervening mesenteric fat in the descending duodenum suggestive of intussusception (Figure 1).
(A) Initial esophagogastroduodenoscopy (EGD) showing duodenal ulcer with underlying edema and an overlying blood clot mimicking a mass lesion. (B) Follow-up EGD showing normal mucosa in the duodenal bulb with complete disappearance of the previously noted mass lesion.
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F2
In the duodenal bulb, there was a mass-like lesion composed of a duodenal bulb ulcer with edema and a tightly adherent blood clot (Figure 2). Repeat EGD 6 weeks after completion showed normal mucosa in the duodenal bulb with complete disappearance of the previously noted mass lesion (Figure 2).