PMC4921186_01
Case 1. Axial image from IV-contrast-enhanced CT demonstrates a small ulceration along the medial aspect of the jejunum distal to the anastomosis.
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CT of the abdomen and pelvis with intravenous contrast (Fig. 1) revealed a small ulceration along the medial aspect of the jejunum just distal to the gastrojejunal anastomosis.
PMC4921186_02
Case 2. Selected coronal images demonstrate a small amount of stranding at the inferior aspect of the proximal jejunum near the anastomosis (A and B, curved arrow), and a more anterior image demonstrates a tiny ulceration inferiorly (C, straight arrow).
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CT of the abdomen and pelvis with intravenous contrast (Fig. 2) revealed a small ulceration along the posterior aspect of the jejunum at the gastrojejunal anastomosis.
PMC4921186_03
Case 3. Axial (A), coronal (B), and sagittal (C) images of the G-J anastomosis demonstrate a small anterior outpouching with some adjacent ill-defined stranding (arrows).
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CT of the abdomen and pelvis with intravenous contrast (Fig. 3) was concerning for an ulceration along the anterior aspect of the jejunum just distal to the gastrojejunal anastomosis.
Case 3. Axial (A) and magnified coronal (B) and sagittal (C) prone images following administration of positive oral contrast better demonstrate the small ulceration, now filling with contrast, and a small amount of adjacent stranding.
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A small volume of oral contrast was administered, and repeat imaging of the upper abdomen confirmed the diagnosis of marginal ulcer (Fig. 4).
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Case 4. Axial images from IV and oral contrast-enhanced CT demonstrate wall thickening of the jejunum just distal to the G-J anastomosis (A) with ulceration along its undersurface (B) and some adjacent stranding (C) (arrows).
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CT of the abdomen and pelvis with intravenous and oral contrast  (Fig. 5) was concerning for a marginal ulcer, including thickening of the proximal roux limb, adjacent stranding, dilation of the proximal gastric pouch, and contrast reflux into the esophagus.
Case 4. Endoscopic image from EGD performed the following day demonstrates a nonbleeding, 1.5cm, marginal ulceration located on the jejunal side of G-J anastomosis.
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An esophagogastroduodenoscopy performed 1 day later (Fig. 6) confirmed the diagnosis of a 1.5cm marginal ulceration without active bleeding.