PMC3700467_01
Abdominal CT Angiography showing abdominal aortic aneurysm and large retroperitoneal mass encasing abdominal aorta with close proximity to duodenum (star) and ileum (star).
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A recent routine surveillance Abdominal CT followed by MRI (Figure 1) demonstrated a 9.2x8.0x7.9 cm retroperitoneal mass encasing the aorta and intimately associated with the 3rd and 4th portions of the duodenum as well as to parts of the jejunum and ileum.
H&E and CD20 Antibody staining showing poorly differentiated lymphoid cells that are strongly CD20 positive.
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CT-guided biopsy of the mass revealed an invasive, poorly differentiated, EBV positive, diffuse large B-cell lymphoma (Figure 2).
CT Angiography showing bowel gas and adjacent extravasations of contrast material with in the mass pathognomonic of a primary aortoenteric fistula.
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