what does bile duct dilation mean?
<answer> Dilation of the common bile duct typically means a 'widening' of the duct at some point. <context> 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.