Histology, hematoxylin and eosin. A. Pulmonary thromboembolus at the bifurcation of the pulmonary arteries and pulmonary trunk. B. Hemorrhagic infarct and thromboemboli in varying stages of organization, right lower lobe, lung. C. Cross section of the proximal left anterior descending coronary artery with thromboembolus. D. Cross section of the posterior descending coronary artery with thromboembolus.