Review for 10.1186/s12876-021-01730-8 (2021)

Reviewer’s report
Title: 
Gastrointestinal symptoms as first remarkable signs of ANCA-associated
granulomatosis with polyangiitis: case report and review
Version: 
1 
Date: 
22 Feb 2021
Reviewer's report:
This case report concerns a case of ANCA associated vasculitis GPA began with
GI symptoms. 
The paper is well illustrated.
I have some comments
Case Report
Was the patient admitted in other department before to be transferred in
Nephrology department? It is not clear. 
Please clarify
Was fecal calprotectin evaluated at the time of the diagnosis of IBD? 
Was lung
x-ray or CT scan performed? These details 
should be add in the text
Respiratory 
bleeding sometime may occur without bloody sputum but only with
anemia and 
opacities in lung x rays or CT scan. 
Discussion
Line 220 The authors can not be sure, because nasal ulcers was not searched at
the time of first GI involvement. 
Nasal ulcers take some time to develop. This
clarification should be add in the text
Minor 
Line 35 and 235 
the verb is omitted
Line 90 The verb confirmed means a diagnosis already made
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