Figure 4From: Systemic IgG4-related disease with extensive peripheral nerve involvement that progressed from localized IgG4-related lymphadenopathy: an autopsy caseA retroperitoneal mass around the left internal iliac artery. A: Fibrotic nodules approximately 2Â cm in diameter are seen. B: Fibrosis and dense inflammatory cells are patchily distributed around the peripheral nerves, and obliterative phlebitis is seen. C: At high magnification, infiltrates of plasma cells and eosinophils are seen.Back to article page