Fig. 1From: Acute neutrophilic vasculitis (leukocytoclasia) in 36 COVID-19 autopsy brainsCerebral microvasculopathy with mural collagenosis. (A) Severe mural distortion with irregular adventitial collagenosis of a microvessel in midbrain tegmentum near substantia nigra (Case 13). (B) Dilated microvessel with somewhat compact adventitial collagenosis in periventricular calcarine white matter (Case 12). Scale bars: 20 μm in (A); 50 μm in (B)Back to article page