From the question on page 1297

Computed tomography (CT) scans demonstrated bilateral renal (fig 1A in the question section) and retroperitoneal soft-tissue masses (fig 1B) with thoracic (not shown) and abdominal lymphadenopathy (fig 1A) mimicking lymphoma. Histological examination for renal masses, lymphadenopathy and bone marrow revealed only chronic inflammation with fibrosis. The patient was diagnosed with chronic inflammation of unknown …