What are indications for surgery in chronic pancreatitis?

Chronic intractable abdominal pain unresponsive to nonsurgical treatment Suspicious Pancreatic Cancer Persistent CBD obstruction , unresponsive to endoscopic Treatment Duodenal Obstruction Splenic v. Thrombosis with Bleeding Gastric Varices Symptomatic or enlargement pancreatic Pseudocyst Persistent Pancreatic ascites or fistula