case_images: PMC11107305_01
case_images: CTA of the abdomen and pelvis with contrast revealing gastric wall thickening as indicated by the red arrow (A) and circumferential wall thickening with aneurysmal dilation of the fourth portion of the duodenum and proximal jejunum as indicated with the red arrow with adjacent mesenteric and retroperitoneal adenopathy (B).
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case_images: A computed tomography angiography (CTA) abdomen and pelvis with contrast revealed gastric wall thickening and circumferential wall thickening with aneurysmal dilation of the fourth portion of the duodenum and proximal jejunum with adjacent mesenteric and retroperitoneal adenopathy (Figure 1); the duodenal and jejunal findings were new compared to the abdominal CT 3 months prior.
case_images: Esophagogastroduodenoscopy demonstrating a 29-mm oozing, cratered, ulcerated gastric mass with adherent clot.
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case_images: A subsequent upper gastrointestinal (GI) endoscopy revealed a 29-mm oozing cratered gastric ulcerated mass with adherent clot found on the gastric body (Figure 2).
case_images: (A) Staining with hematoxylin and eosin revealing gastric mucosa infiltrated with a B-cell lymphoma with morphologic and immunophenotypic features that resemble Burkitt's lymphoma. (B) Immunohistochemistry stains with atypical lymphocytes that are greater than 90% positive for Ki-67.
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case_images: Biopsies revealed gastric mucosa infiltrated with a B-cell lymphoma with morphologic and immunophenotypic features that resembled Burkitt's lymphoma (Figure 3).