The next type of necrosis is Fat Necrosis
The commonest cause of this type of necrosis is acute pancreatitis. So what happens in acute pancreatitis. The proximal part of the pancreas produces lipases. These lipases are usually not released within the pancreas. They are secreted via the pancreatic duct into the intestine and help in fat digestion. In acute pancreatitis what happen is that these enzymes are released within or around the pancreas. This results in fat necrosis. The lipases break down the triglycerides into fatty acids. When calcium binds to fatty acid it results in fat saponification. This gives the chalky white appearance of the affected area.
Remember these clues, Cheesy appearance is seen in caseous necrosis and chalky white appearance is seen in fat necrosis.