Review for 10.1186/s12876-022-02196-y (2022)

Reviewer’s report
Title: 
Biliary balloon dilator impaction in a non-dilated bile duct with
anatomical variations: a case report
Version: 
0 
Date: 
25 Mar 2021
Reviewer's report:
In the Case report, the authors used off label a biliary dilation balloon to retrieve
a small stone from a thin CBD having anatomical variations and associated
adverse events with the procedure that were tackled successfully.
Few comments:
1. Abstract. Case presentation. Avoid reporting as first case.
2. In the hindsight, would the authors have considered spyglass & laser
lithotripsy? That may be easier.
3. Discussion. In general, large stone diameter is a risk factor for difficult bile
duct stones. Reframe. Large stones are considered as difficult bile duct stones.
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