Review for 10.1186/s12876-022-02454-z (2022)

Reviewer’s report
Title: 
Natural history of intracholecystic papillary neoplasm (ICPN); a rare case
of ICPN whose natural history was closely followed by ultrasound.
Version: 
1 
Date: 
19 Jun 2022
Reviewer's report:
This second version of the paper is a great improvement, the authors are to be
commended.
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
presented?
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from apparent manipulation?
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