Endoscopic management of biliary stricture generally requires dilation using devices such as an endoscopic retrograde cholangiopancreatography (ERCP) balloon dilation catheter before stenting [1]. Endoscopic ultrasonography (EUS)guided biliary drainage (EUS-BD) also requires fistula dilation before stenting. Recently, ultraslim balloon catheters [1] and diathermic dilators [2] have also been de...
