Fig. 2. Operative and pathologic findings of primary central nervous system vasculitis. A: The arachnoid membrane was focally thickened with yellowish discoloration, while the cortex showed a normal appearance. B: Vasculocentric lymphocytic infiltration (hematoxylin and eosin staining; original magnification, ×100). C: Immunopositivity for CD3 (original magnification, ×200). D: Immunopositivity for CD79a (original magnification, ×200).
