Review for 10.1186/s12876-020-01535-1 (2020)

Reviewer’s report
Title: 
Size measurements of hepatocellular carcinoma: comparisons between
contrast and two-dimensional ultrasound
Version: 
1 
Date: 
04 Oct 2020
Reviewer: 
Seogsong Jeong
Reviewer's report:
The authors have addressed my concerns, except for one concern.
I see that CA-199 elevation was found in 23/58 patients, and AFP was elevated
in 48 patients.
What was the cut-off for elevation of CA19-9?
HBV-associated intrahepatic cholangiocarcinoma presents similar characteristics
in the imaging.
The study population may not be limited to HCC, but limited to primary liver
cancer, including intrahepatic cholangiocarcinoma.
This should be clarified.
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