Review for 10.1186/s12876-019-1061-6 (2019)

Reviewer ’s report  
 
Title:  Hepatic metastatic paraganglioma 12 years after retroperitoneal paraganglioma resection: 
a case report  
 
Version: 0 Date: 19 Jun 2019 
 
Reviewer:  Huseyin  Alkim  
 
Reviewer’s report:  
 
This is an interesting case report describing hepatic metastasis of a redroperitoneal 
chemodectoma. I think that, this is a very rare case that publication is appropriate. But I have two 
important criticism s to the authors  
 
1-I think it is not right to conclude as "treatment is often unnecessary for liver metastasis of 
chemodectomas" with the present data. TACE may have been the cause of the stability of the 
tumor. Also when I look at the old and new tomograp hy photos it looks that the tumor have some 
shrinkage (it was a bit smaller).  
 
2-What was the follow -up time of the patient after treatment refusal? Was any new imaging 
performed during this period?  
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
No 
 
Does the work include the necessary controls?  
If not, please specify which controls are required in your comments to the authors.  
 
No 
 
Are the conclusions drawn adequately supported by the data shown?  
If not, please explain in your comments to the authors.  
 
No 
 
Are you able to as sess any statistics in the manuscript or would you recommend an 
additional statistical review?  
If an additional statistical review is recommended, please specify what aspects require further 
assessment in your comments to the editors.  
 
Not relevant to this manuscript  
 
Quality of written English  
Please indicate the quality of language in the manuscript:  
 
Acceptable  
 
Declaration of competing interests  
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3. Do you hold or are you currently applying for any patents relating to the content of the 
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4. Have you received reimbursements, fees , funding, or salary from an organization that 
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5. Do you have any other financial competing interests?  
 
6. Do you have any non -financial competing interests in relation to this paper?  
 
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below. If your reply is yes to any, please give details below.  
 
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