Labs
Lipase: Normal or slightly elevated
LFTs: Increased bilirubin, alkaline phosphatase: Associated with compression of intrapancreatic bile duct (10-15%)
Pancreatic function tests: Secretin stimulation
Gamma-globulin IgG elevation (IgG4) in autoimmune
Imaging
Plain film: pancreatic calcifications (30%)
CT: intraductal calcifications (insensitive for early disease)
ERCP: gold standard
Lipase: Normal or slightly elevated
LFTs: Increased bilirubin, alkaline phosphatase: Associated with compression of intrapancreatic bile duct (10-15%)
Pancreatic function tests: Secretin stimulation
Gamma-globulin IgG elevation (IgG4) in autoimmune
Plain film: pancreatic calcifications (30%)
CT: intraductal calcifications (insensitive for early disease)
ERCP: gold standard
Chronic pancreatitis
Gastroesophageal reflux disease 
Symptomatic cholelithiasis
Peptic ulcer disease with or without perforation
Choledocholithiasis
Gastritis
Acute pancreatitis
Pancreatitis