Chronic pancreatitis is a long-standing inflammation of the pancreas that alters the organ's normal structure and functions. It can present as episodes of acute inflammation in a previously injured pancreas, or as chronic damage with persistent pain or absorption. It is a disease process characterized by irreversible damage to the pancreas as distinct from reversible changes in acute pancreatitis.

The different treatment options for management of chronic pancreatitis are medical measures, therapeutic endoscopy and surgery. Treatment is directed, when possible, to the underlying cause, and to relieve pain and malabsorption. Insulin dependent diabetes mellitus may occur and need long-term insulin therapy. The abdominal pain can be very severe and require high doses of analgesics, sometimes including opiates. Alcohol cessation and dietary modifications (low-fat diet) are important to manage pain and slow the calcific process. Antioxidants may help but it is unclear if the benefits are meaningful. Pancreatic enzyme replacement is often effective in treating the malabsorption and steatorrhea associated with chronic pancreatitis. Treatment of CP consists of administration of a solution of pancreatic enzymes with meals. Some patients do have pain reduction with enzyme replacement and since they are relatively safe, giving enzyme replacement to a chronic pancreatitis patient is an acceptable step in treatment for most patients. Treatment may be more likely to be successful in those without involvement of large ducts and those with idiopathic pancreatitis.

The mechanism of chronic pancreatitis viewed from a genetic standpoint indicates early onset of severe epigastric pain beginning in childhood. It is an autosomal dominant disease, chronic pancreatitis disease is identified in the cationic trypsinogen gene PRSS1, and mutation, R122H. R122H is the most common mutation for hereditary chronic pancreatitis with replacement of arginine with histidine at amino acid position 122 of the trypsinogen protein. There are, of course, other mechanisms  alcohol, malnutrition, smoking  each exhibiting its own effect on the pancreas.

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