Fig. 11

IGG4-related renal disease. Axial contrast CT images demonstrate (a) a sausage-shaped pancreas with loss of normal pancreatic lobulations and presence of a hypoattenuating surrounding halo/capsule (arrowheads) consistent with IGG4-related autoimmune pancreatitis. (b) Bilateral hypoattenuating renal masses (arrows) were present compatible with IGG4-related renal disease in light of the pancreatic findings, mimicking the multiple masses of lymphoma. Axial contrast CT 3 months later (c) post-treatment with steroids demonstrates resolution of the renal masses confirming the initial diagnosis