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A) Dura mater exhibited patches with increased cellularity (arrows); B) Necrotizing vasculitis with eosinophils (E) in a blood vessel (BV); C) Accumulations of epithelioid cells (E), and occasional multinucleated giant cells (MGC); D) CD34 immunohistochemical staining showed remnants of endothelium (black arrows, brown stain) amid necrosis and inflammation (white arrows).
