RADIOLOGY: ABDOMEN: Case# 33129: PERI-RENAL & PULMONARY LYMPHOMA. 54 year old male with lung mass. 1. Bilateral scattered air space opacities within the lung bases. 2. Nodal masses at the splenic hilum, posterior to the left kidney, and in the para-aortic region as described above. 3. Soft tissue density enveloping both kidneys within Gerotas fascia, consistent with perirenal lymphoma. (This case was discussed with Dr. Berland). 4. Patchy renal enhancement which likely represents lymphomatous involvement of the renal parenchyma bilaterally.