Acute pancreatitis. Lesions on the back of a patient with acute pancreatitis. Acute pancreatitis is a sudden inflammation of the pancreas. It can have severe complications and high mortality despite treatment. While mild cases are often successfully treated with conservative measures, such as NPO (nil per os, fasting) and aggressive intravenous fluid rehydration, severe cases may require admission to the intensive care unit or even surgery to deal with complications of the disease process.
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