1.1 Background (I)
1.1.1 10%~50% of the patients who previously underwent cholecystectomy experience recurrent abdominal pain with or without diarrhea, abdominal distention, enzymatic changes, etc., and sphincter of Oddi dysfunction (SOD) accounts for about 13% of such cases;
1.1.2 Sphincter of Oddi
The study described in this report will be approved by the ethics committee of Yonsei University School of Medicine, Seoul, Korea. Between July 2012 and February 2013, 380 patients fulfilled the inclusion criteria, 380 of whom were included in the final analysis. Consecutive patients were recruited