Fig. 3
From: Acute neutrophilic vasculitis (leukocytoclasia) in 36 COVID-19 autopsy brains
Nucleus of the tractus solitarius region. (A) Small, dilated microcirculatory channel adjacent to the nucleus in the rostral medulla contains PMNs with karyorrhectic nuclei (Case 14). (B) There is a thromboembolized microcirculatory channel at edge of nucleus of tractus solitarius (arrow) and similar blood vessel near the nucleus, with prominent reactive gliosis in the field (Case 36). Scale bars: 10 μm in (A); 20 μm in (B)