Right kidney (A-C) and prostate (D-F). A: Multiple white patchy lesions are seen in the renal cortex. B: A focal IgG4-RD lesion is seen in the renal cortex. C: Inflammatory cell infiltrates around the peripheral nerves in the renal pelvis. D-F: In prostate, although macroscopically obscure (D), inflammatory cells infiltrate the peripheral zone (D and E, red dashed lines), whereas plasma cells and eosinophils infiltrate around and into the peripheral nerves (F).
Fujii et al. Diagnostic Pathology 2014 9:41 doi:10.1186/1746-1596-9-41