The 'beading' appearance is seen in the condition:
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.
Chronic pancreatitis
Acute pancreatitis
Gall stone ileus
Sub-acute intestinal obstruction