<unk>  inflammatory process that may involve surrounding tissue and remote organ systems
Disease can range from mild inflammation to severe necrosis and multi-organ failure
Gallstones (including microlithiasis) - 35-40% of cases in most parts of the world 
Alcohol<unk>  and chronic consumption) - 30% of cases in the US 
Hypertriglyceridemia
ERCP
Most common post-ERCP complication, usually from mechanical injury from instrumentation of the pancreatic duct or hydrostatic injury from contrast injection
Drugs (Azathioprine, cisplatin, furosemide, tetracycline, thiazides, sulfa, valproate, didanosine, pentamidine, etc)
Autoimmune disease (SLE, Sjögren, etc)
Abdominal trauma
Postoperative complications
Infection
Bacterial: Legionella, Leptospirosis, Mycoplasma, Salmonella
Viral: Mumps, coxsackie, CMV, echo, Hep B
Parasitic: ascaris, cryptosporidium, toxoplasma
Hypercalcemia
Hyperparathyroidism
Ischemia
Posterior penetrating ulcer
Scorpion venom (Caused by the genre Tityus and Leiurus which are distributed in Central/South America and North/East Africa, respectively
Organophosphate insecticide
Pancreatic or ampullary tumor
Pancreas divisum with ductular narrowing on pancreatogram
Oddi sphincter dysfunction
Idiopathic (15-20% of cases)
Most common post-ERCP complication, usually from mechanical injury from instrumentation of the pancreatic duct or hydrostatic injury from contrast injection
Bacterial: Legionella, Leptospirosis, Mycoplasma, Salmonella
Viral: Mumps, coxsackie, CMV, echo, Hep B
Parasitic: ascaris, cryptosporidium, toxoplasma
Acute pancreatitis
Gastroesophageal reflux disease 
Acute calculous cholecystitis
Peptic ulcer disease with or without perforation
Chronic pancreatitis
Gastritis
Duodenal hematoma
Pancreatitis