These two photographs are from the lung of an ox. The first one of the two is of the pleural surface in which you can perceive a very strange pattern of redness. Look at the photograph on the left.
In the photograph on the right, there are specks of redness throughout the lung parenchyma on this cut edge. Across the center of the slide from about 10 o'clock to 3 o'clock I see a vessel and at 12 o'clock I see a bunch of red stuff with some yellow-white, creamy material nearby. Now that area is the basic lesion here. Everything else is secondary. You got any idea what is going on? Well, if you don't, the issue is that there is a parenchymal abscess or bit of purulent inflammation that happened to occur adjacent to a pulmonary artery and perhaps an airway. I don't see the airway. The inflammatory process eroded the vessel wall, ruptured the vessel. It also eroded the airway.
The result was that there was a lot of bleeding into significant sized airways and breathing movements then distributed specks of blood through this lung. Now this slide has a relationship to an earlier case.
The syndrome portrayed in these two photographs is a clinically recognizable one and you might hunt around in Blood and Henderson and see if you can find it. It may help you to learn how to use that book more effectively to do that.
