<prompt> Gold standard test for investigation for chronic Pancreatitis detection of early pathologies and simultaneous treatment possible e.g., duct dilation, stent inseion Ductal stones, seen as filling defects Chain of lakes or string of pearls appearance characteristic feature Irregularity, dilation of the main pancreatic ductMRIERCPPancreatic function testsFecal fat estimation  <response>: ERCP - Considered the gold standard for the diagnosis of CP, the advent of secretion MRCP and EUS have significantly decreased its role as a diagnostic test ERCP : detection of early pathologies and simultaneous treatment possible e.g., duct dilation, stent inseion Ductal stones, seen as filling defectsChain of lakes or string of pearls appearance characteristic featureIrregularity, dilation of the main pancreatic duct Ref: Sabiston 20th edition Pgno :1535 