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edure to prevent surgical reintervention for achalasia and diverticulum. Selective biliary cannulation (SBC) is currently accepted as the first challenge of endoscopic retrograde cholangiopancreatography (ERCP), especially in patients with altered anatomy such as Billroth II gastrectomy. A rotatable sphincterotome (RS) might be considered useful for guiding the directional axis of SBC. This study aimed to evaluate the efficacy and safety of RS for biliary cannulation in patients with prior Billroth II gastrectomy. This is a retrospective
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