Figure 2.

Representative pathological images of CNS and PNS. (a) A section of frontal cortex and leptomeninges (L) shows thickened, inflamed meninges and adjacent cortex with infarcts (*). (b) A large perivascular chronic inflammatory infiltrate in the putamen (arrow). (c) An infarct in the cerebellar white matter and cortex (*). There is a vessel with a surrounding chronic inflammatory infiltrate at the left edge of the infarct. (d) A Bielschowsky silver stain of an entire transverse section of the spinal cord shows severe, unilateral corticospinal tract degeneration, both lateral (**) and anterior (*) tracts (Bielshowsky silver stain). (e) A section of a cranial nerve shows a chronic inflammatory infiltrate associated with small vessels in the perineurium. The degree of myelination of surrounding axons appears normal. Autopsy tissues are stained with standard H&E histological stains. Scale bars: (a‒c) 200 μm, (e) 25 μm.