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Washington University Experience | MISCELLANEOUS | Idiopathic Hypertrophic Pachymeningitis (IgG4 Disease) | 1B5 Idiopathic Hypertrophic Pachymeningitis (hyper-IgG4, Case 1) dura H&E 3

Increased numbers of plasma cells, both singly scattered and clustered, comprised approximately 30% of the cells in the infiltrate. (H&E)

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