Palmer PNLE Practice Test

Coagulative necrosis arises when solid organs suffer ischemic or hypoxic injury. The defining idea is that protein denaturation from the lack of blood flow preserves the tissue’s basic architecture for a time, so dead cells keep their outlines and the area remains firm and pale despite cell death. This pattern is typical of organs like the heart, kidney, and spleen after vascular occlusion. In contrast, brain tissue exposed to ischemia tends to show liquefactive necrosis because hydrolytic enzymes rapidly digest the tissue, turning it into a soft, liquefied area. Caseous necrosis is a distinct pattern associated with granulomatous inflammation from certain infections, such as tuberculosis. So the association here is ischemic/hypoxic injury in solid organs.