<prompt> The beading appearance is seen in the condition:Chronic pancreatitisAcute pancreatitisGall stone ileusSub-acute intestinal obstruction  <response>: In chronic pancreatitis, the pancreatic duct may show beading or a chain-of-lakes or string-of-pearls appearance because of alternating stenosis and dilatation of the pancreatic duct. Other features of chronic pancreatitis include strictures, cysts and ductal calculi. 