Noduler Vasculitis

Dr found noduler vasculitis by watching dark red spots. Then tell to test p ANCA and c ANCA. That tests are negative. But CRP is 4.13. No meeting with Dr after that test reports. What does that negative tests mean? And CRP test mean? I will meet Dr with that reports in next week.
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Doctor Answers (1) on Noduler Vasculitis

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Dr. Swathi S Aithal Bangalore | General Physician
Hello. Crp is c reactive is used as a tool to indicate acute or chronic infection, tissue necrosis,ischaemia,metabolic syndrome,smoking,post surgery, obesity your case it's done to check for inflammatory condition like vasculitis...c anca and p anca negative helps to rule out vasculitis.
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