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. 2026 Jun 4;13(4):e200604. doi: 10.1212/NXI.0000000000200604

Figure 2. Histopathologic Findings of Brain and Dural Biopsy.

Figure 2

(A) H&E stain demonstrating lymphocytes (predominantly CD3−positive T cells), plasma cells, and macrophage infiltrating dura (×2). (B) H&E stain showing foamy macrophages, Touton-like giant cells, and areas of necrosis (×10). (C) CD 163 immunostain highlighting a dense collection of macrophages within the dura and extension into the gray matter (×2). (D) Luxol fast blue special stain showing preserved myelin within both white and gray matter (×2).