Review for 10.1186/s12876-021-01970-8 (2021)

Reviewer’s report
Title: 
A rare variation of duplicated portal vein: left branch derived from splenic
vein mimicking cavernous transformation
Version: 
0 
Date: 
18 Aug 2021
Reviewer's report:
The authors have presented an interesting case of aberrant portal vein. I have
following comments regarding the manuscript.
1. Please provide the ultrasound image showing the liver space occupying lesion.
2. What was the liver space occupying lesion on CT that was visible on USG?
3. Please provide a schematic diagram showing the portal vein anomaly in the
index case.
4. Rather than duplication of portal vein it appears to be more of an aberrant vein
connecting splenic vein to the left liver. This aberrant vein cannot be labelled as
duplicate portal vein.
5. There are numerous grammatical mistakes and typographical errors such as
liver occupation lesion throughout the manuscript which need to be corrected.
6. Considering the presence of multiple collaterals at the hepatic hilum, it is
important to know whether the main portal vein was patent or thrombosed. It is
possible that all the visible vessels at the porta hepatis are collaterals including
the aberrant vein connecting splenic vein to the left liver.
7. Was there any evidence of portal hypertension on endoscopy, or clinically?
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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?
Yes
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Yes
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Yes
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Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
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