Vascular proliferation, angiectasis, perivascular lymphocyte infiltration, hemorrhage, necrosis, cystoid degeneration and calcification were seen frequently.
血管增生扩张、血管周围淋巴细胞浸润、出血、坏死、囊性变常见。
2
Under light microscopy, the brain tissue was loose, the perivascular spaces could be observed and some neurons showed slight degeneration.