what is the mean of common bile duct dilation (9mm)?cdc
Dilation of the common bile duct typically means a 'widening' of the duct at some point. It expands in size due to possible blockage by a stone, widens due to a spasm downstream that results in a back-up of bile and pancreatic fluids, or it may expand due to another form of disease state. Some people experience a dilation/wideing of the CBD in the years following removal of the gallbladder although the reason this happens is unknown at the current time.