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Washington University Experience | MISCELLANEOUS | Idiopathic Hypertrophic Pachymeningitis (IgG4 Disease) | 5A3 IIdiopathic Hypertrophic Pachymeningitis (AANP 1991, Case 8) H&E X20 3

Fibrous tissue is a prominent part of the reactive process and separates collections of inflammatory cells including lymphocytes and plasma cells (H&E) (AANP Diagnostic Slide Session 1991, Case 8)

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