Review for 10.1186/s12876-018-0765-3 (2018)

Reviewer ’s report  
Title: Recurren t common bile duct stones as a late complication of endoscopic sphincterotomy  
 
Version: 1 Date: 26 Nov 2017  
 
Reviewer: Cheng -Hsin Chu  
 
Reviewer's report:   
(A) This is a retrospective study cohort with ERCP in 1148 patients .  51 patients out of post -
EST 573 dev eloped recurrent CBD stones in them  
 
1. Dilated CBD more than 12 mm, 2. Stricture of  major papillaost -ES to 2 -5 mm 3. presence of 
the ampulla within or on the edge of a duodenal diverticulum  
 How about the type of JPD categorization and size measuring you  adopt ?  (J Gastroenterol 
Hepatol, 2013. 28(5): p. 893 -8  ) and number (or %) of patient cirrhosis (T. -J. Tsai et al. / 
Journal of the Chinese Medical Association 75 (2012) ) and method of stones extraction; such as 
basket, balloon or mechanical basket ?  
 
(B) The time to recurrence ranged from 6 months to 15 years ( mean 3.3 years) . Do you had the 
above analysis and distribution curve  in incidence (shown as Figure 2) ?   
(C) Does the number of ERCP performed in single patient relate to the CBD stones rec urrence 
early or more frequent ?  
(D) Do you had a new findings or comparison in long -term outcome between Tsujino,T et al. and 
the reported your study ( ERCP+balloon vs ERCP+ES ) ?  
(E) What is your explanation or hypothesis in the more dilated CBD size the more easy CBD 
stones recurrence ?  
---Dyskinesia and/or delay biliary transit ?  
---Incompetency of ampulla of Vater ?  
(F) Do you have an analysis of clinical difference in the pa tients group early recurrent CBDs 
within one year and delay CBDs recurrence more than 10 years ?  
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the a uthors.  
Yes 
Does the work include the necessary controls?  
If not, please specify which controls are required in your comments to the authors.  
No 
Are the conclusions drawn adequately supported by the data shown?  
If not, please explain in your comments to t he authors.  
Yes 
Are you able to assess any statistics in the manus cript or would you recommend an 
additional statistical review?  
If an additional statistical review is recommended, please speci fy what aspects require further 
assessment in your comments to the editors.  
Not relevant to this manuscript  
Quality of written English  
Please indicate the quality of language in the manuscript:  
Acceptable  
Declaration of competing interests  
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below. If your reply is yes to any, please give details below.  
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