What are the etiologies causing acute pancreatitis?

Obstruction (of wirsung, most important is gall stones, tumor maybe, parasites, diverticulia...) Alcohol or other toxins (not imp in lebanon, but major cause in US and europe) Metabolic abnormalities (TGs, DM, hypercalcemia (due to hyperPTH)) Infection (rare) Vascular (rare, more in gut and liver) Trauma (maybe unpredictable, pancreas can rupture) PostOp (cardiac surgery for example) Post ERCP (papillary injury causing inflammation) Sphincter of Oddi (dysfunction) Drug association (IBD - sulfasalazine, most important is furosemide (lasix))