What do you suggest if my dad may have pancreatitis or a pancreatic tumor. why is it so hard to diagnosis?

Not hard to Dx.: Pancreatic Ca is commonly found in the head of the pancreas. Since the tumor arises in the panc. duct, just behind it is the bile duct entering the duodenum. The bile duct gets blocked from tumor and one has painless jaundice, where pain is from pancreatitis with a mass. this does not produce jaundice. An ERCP with transduodenal bx can give needed diagnosis.