Fig. 7.

Absence of congophilia of CWPs with glial proliferation. a, b Cotton wool plaques (CWPs) on section stained with Congo red. Observation with polarized light demonstrates apple green birefringence in the amyloid angiopathy but not CWPs (b). The insular cortex. c, d GFAP-positive astrocytes (c) and Iba1-positive microglias (d) surrounding CWPs. The inferior temporal gyrus. All scale bars = 50 μm