Thrombosis of the vasa vasorum of the large and medium size pulmonary artery and vein leads to pulmonary thromboembolism in COVID-19

Figures

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  Figure 1. Photomicrograph of the lung. A – thrombosis of the vasa interna (black arrow) of a pulmonary vein in COVID-19 (H&E 10x20); B – thrombosis of the vasa interna (black arrow) of a pulmonary artery with thrombosis of the pulmonary artery, in COVID-19(H&E 10x20); C – thrombosis of the vasa externa (black arrow) and fibrin thrombus within the lumen in COVID-19&E 10x20); D – thrombosis of a medium size pulmonary artery with thrombosis of its vasa interna (black arrow) and new thrombus formation within the lumen (blue arrow) in COVID-19 (H&E 10x20).

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  Figure 2. Photomicrograph of the lung. A – multiple vasa interna thrombosis (black arrows) in the wall of a pulmonary artery, and fibrin thrombus in its lumen of the pulmonary artery (green arrow) in COVID-19 (H&E 10x20); B – thrombosis of arterioles (black arrows) and capillaries (blue arrow) of the lungs in COVID-19 (H&E 10x20); C – thrombi in the vasa vasorum interna (black arrows) and fibrin thrombus in the lumen of the pulmonary artery, COVID-19 (H&E 10x20); D – thrombosis of venule (black arrow) in COVID-19 (H&E 10x20).

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  Figure 3. Photomicrograph of the lung. A – thrombosis of vasa interna of pulmonary vein in COVID-19 (black arrow)(H&E 10x20); B – thrombosis of the vasa interna (black arrow) of a pulmonary artery in COVID-19 and prostate cancer. There is also pulmonary hemorrhage (H&E 10x40); C – thrombosis of vasa interna (black arrow) of pulmonary artery in COVID-19 with impending embolism (H&E 10x40); D – thrombosis of vasa interna (black arrow) of the pulmonary artery in COVID-19 with impending embolism (H&E 10x40).