Review for 10.1186/s12876-021-02059-y (2021)

Reviewer’s report
Title: 
Laparoscopic S7 hepatectomy for hepatic mucinous neoplasm: A case
report and literature review
Version: 
2 
Date: 
29 Apr 2021
Reviewer's report:
Comments to the authors for Manuscript BMGE-D-21-00016R2:
Title: Laparoscopic S7 hepatectomy for hepatic mucinous neoplasm: A case
report and
literature review
The authors in this case report present their experience with the laparoscopic
resection of a hepatic mucinous neoplasm.
Comments-questions 
to the authors:
1. WHO classification criteria 2019 for mucinous cystic liver neoplasms (MCNs)
should be mentioned in the text and appropriate citation should 
be used.
2. From CT and MRI images it looks to me that this is a segment VII/VIII
lesion, very close to the right hepatic vein. In order this lesion to be completely
removed, it requires either a right hepatectomy or seg VII plus part of seg. VIII
liver resection. 
3. It should be emphasized that anti-echinococcal antibodies is basic part of the
preoperative investigations.
4. It should also be emphasized that CA 19-9 serum levels are elevated in the
minority of cases with mucinous cystic liver neoplasms .
5. Page 3, line 44: << A round, unenhanced low-density lesion with a diameter
of about 4.6 cm was observed>>. Where this lesion was located?
6. Page 4, line 9:<< We concluded that a large hepatic hydatid cyst was present
in the space-occupying lesions in the right lobe of the liver >>. Why you
concluded this? A proper differential diagnosis with criteria should be reported.
7. In histopathology you do not report if clear surgical margins (R0 resection)
was achieved.
8. Page 6, line 25: <<In this case, intraoperative frozen section is an important
means of guiding surgical decisions>>. I think that intraoperative frozen section
is not helpful for surgical decision in liver mucinous neoplasms. Please provide
evidence supporting this. 
9. English language requires improvement.
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