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File:IPLab3FibrinousPericarditis2IPLab3FibrinousPericarditis2b.jpg|This is another example of fibrinous pericarditis in another heart with the . The pericardium has been removed. Most and most of the epicardial surface is covered with fibrinous deposits as in the previous slide. There are a few glistening areas of exposed normal myocardial tissue.File:IPLab3FibrinousPericarditis3IPLab3FibrinousPericarditis3b.jpg|This low-power photomicrograph illustrates the dark-red-staining fibrin deposits on the inner surface (arrows). This pericardium is much thicker than normal and there are numerous inflammatory cells within the pericardial tissue.File:IPLab3FibrinousPericarditis4IPLab3FibrinousPericarditis4b.jpg|This is a higher-power photomicrograph demonstrating fronds of fibrin (arrows) projecting from the surface of the pericardium.File:IPLab3FibrinousPericarditis5IPLab3FibrinousPericarditis5b.jpg|This high-power photomicrograph demonstrates fibrin (red amorphous material) on the surface of the pericardium (1). Note the reactive mesothelial cells on the surface of the pericardium (arrows) and the inflammatory cells within the pericardial tissue.