FIGURE 2.

Gross and microscopic findings of cardiopulmonary thrombotic events identified at autopsy. Representative gross and microscopic findings in 5 decedents found to have macroscopic cardiopulmonary thrombotic events. A, Case 3: firm, slippery, edematous lungs with a combined weight of 1360 g. Sectioning revealed numerous small-caliber thrombi. B, Case 6: gross examination of an edematous 870-g right lung revealed large-caliber pulmonary thromboemboli in the superior branches of the pulmonary arteries. C, Case 3: in the microscopic correlate additionally seen are a predominance of interstitial megakaryocytes (yellow arrows), as well as hyaline membranes (blue arrow; H&E, original magnification ×40). D, Case 5: coronary artery thrombus of the left circumflex coronary artery seen in a homeless man. E, Case 6: microscopically, pulmonary thromboemboli correlated with layered blood components within the arterial lumina (Lines of Zhan), characteristic of antemortem formation (H&E, ×2).