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Washington University Experience | MISCELLANEOUS | Idiopathic Hypertrophic Pachymeningitis (IgG4 Disease) | 2B1 IgG4-Related Hypertrophic Pachymeningitis (Case 2) A1 IgG 3
2B1,2 Although the background is substantial, strong staining of plasma cells with IgG is patchy (arrows, 2B2) and modest compared with IHC staining for IgG4 (2C1-4) (2B1,2 IgG IHC)
