MY CITY SCAN APPEARS ASTROPHIC DILATED MAIN PANCREATIC DUCT WITH MAX DILATATION 6.5MM IN HEAD WITH STONE?

DOCTOR SUGGESTIVE OF CHRONIC PANCREATITIS WITH DILATED MAIN PANCREATIC DUCT WITH CALCULUS IN MPD IN HEAD REGION C MARKED ATROPHY OF PANCREAS PLEAS TELL ME AND HELP ME WHAT IS THE BEST TREATMENT FOR THIS PROBLEM ERCP OR SURGERY OR OTHER TREATMENT BEST FOR ME THANKS HELP ME GIVE ME RIGHT N BEST ANSWER