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Washington University Experience | MISCELLANEOUS | Idiopathic Hypertrophic Pachymeningitis (IgG4 Disease) | 1B3 Idiopathic Hypertrophic Pachymeningitis (hyper-IgG4, Case 1) dura H&E 8 copy
The infiltrate is composed predominantly of small to medium-sized lymphocytes (arrow) with clumped chromatin and abundant small, mature appearing plasma cells (arrowhead).
