Classification	Risk factors
Toxic-metabolic	Alcohol
	Chronic renal failure
	Hypercalcemia (hyperparathyroidism)
	Hyperlipidemia (rare)
	Medications*
	Tobacco
	Toxins
Idiopathic	Early and late onset
	Tropical pancreatitis (tropical calcific pancreatitis and fibrocalculous pancreatic diabetes)
Genetic	Autosomal dominant (cationic trypsinogen [codon 29 and 122 mutations])
	Autosomal recessive modifier genes (CFTR and SPINK1 mutations, cationic trypsinogen [codon 16, 22, and 23 mutations], alpha 1-antitrypsin deficiency)
Autoimmune	Autoimmune chronic pancreatitis associated with inflammatory bowel disease, Sjögren syndrome, primary biliary cirrhosis
	Isolated autoimmune chronic pancreatitis
Recurrent and severe acute pancreatitis	Postirradiation
	Postnecrotic (severe acute pancreatitis)
	Recurrent acute pancreatitis
	Vascular ischemia
Obstructive	Pancreas divisum
	Sphincter of Oddi disorders
	Duct obstruction (pancreatic or ampullary tumors, posttraumatic pancreatic duct fibrosis)