1. Pancreatitis
Acute pancreatitis is usually caused by gallstones or by drinking too much alcohol, but these aren't the only causes. A determining factor in the diagnosis of hereditary pancreatitis is two or more family members with pancreatitis in more than...
http://digestive.niddk.nih.gov/ddiseases/pubs/pancreatitis/

2. Pancreatitis: treatment, symptoms, cause, complications, long-term outlook, risks, statistics
A gallstone can block the pancreatic duct, trapping digestive enzymes in the pancreas and causing pancreatitis. The symptoms of acute pancreatitis usually begins with severe pain in the upper abdomen.
http://www.mamashealth.com/pancreatitis.asp

3. CNN.com - Ashcroft remains in intensive care - Mar 12, 2004
Gallstone pancreatitis is a condition in which a gallstone blocks a duct of the pancreas, a gland that produces enzymes that aid in the digestion of food. Ashcroft entered the hospital last Thursday night with acute gallstone pancreatitis.
http://www.cnn.com/2004/US/03/11/ashcroft.recovering/