Specimen Serum Special Instructions Minimum sample volume: 3 ml Factors affecting results None known Reference Range Myeloperoxidase (MPO) Antibodies Negative: ≤5.0 IU/ml Positive: >5.0 IU/ml Proteinase 3 (PR3) Antibodies Negative: ≤3.0 IU/ml Positive: >3.0 IU/ml Test Usage ANCA are a characteristic finding in cases of ANCA-associated vasculitis (AAV), and are often requested as part of […]
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