Common tests used for diagnosis are fecal elastase
in stool, serum trypsinogen, CT scan
and ultrasounds (which often come back normal), MRI, ERCP and MRCP (all of which are more conclusive). Usually after chronic pancreatitis patients develop insulin dependent diabetes mellitus and this should be ruled out by fasting blood glucose, post prandial blood glucose and glycosylated hemoglobin (a test which gives last 3 months control over blood glucose). Diabetes often causes rapid weight loss.