Risk Factors for Recurrence of Primary Bile Duct Stones
Risk Factors for Recurrence of Primary Bile Duct Stones
Recurrent common bile duct stone is one of the risk factors of recurrent cholangitis.
 However, the exact pathophysiology or mechanism of recurrent cholangitis has not been
 established. Periampullary diverticulum and narrow angle of common bile duct have been
 postulated as risk factors of recurrent common bile duct stone. The aim of this study was to
 evaluate the association between periampullary dierticulum, angle of common bile duct and
 recurrent common bile duct stone.
Recurrent common bile duct stone is one of the risk factors of recurrent cholangitis.
 However, the exact pathophysiology or mechanism of recurrent cholangitis has not been
 established. Periampullary diverticulum and narrow angle of common bile duct have been
 postulated as risk factors of recurrent common bile duct stone. The aim of this study was to
 evaluate the association between periampullary dierticulum, angle of common bile duct and
 recurrent common bile duct stone.

 This study is patient-control setting study. Firstly, from July 2007 through February 2014,
 all the patients who were performed ERCP will be enrolled. The inclusion criteria is the
 patients with common bile duct stone. The exclusion criteria is patients with biliary
 stenosis, PSC, retained GB stone, or who were lost to follow-up. The main outcome is the
 association between periampullary diverticulum, common bile duct angle, and recurrent CBD
 stone. This will be evaluated by univariate and multivariate analyses.
Inclusion Criteria:

 -  Patients who were performed ERCP due to CBD stone or calculous cholangitis

 Exclusion Criteria:

 -  Patients with biliary stricture, PSC, retained GB stone, or who were lost to
 follow-up.