Indicator Explainer
Antineutrophil Cytoplasmic Antibody
An autoantibody that recognizes antigens found in the cytoplasm of neutrophils.
This page explains what the indicator is and how results are interpreted in general terms. Reference ranges depend on the laboratory, the method, and your own situation — no single “normal value” applies to everyone. This page is health information, not a diagnosis. For symptoms, treatment, or urgent concerns, contact a healthcare professional.
When it is tested
Source: National Cancer Institute, NCI Thesaurus 26.09d, C129400. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-19. No individual clinical interpretation or human reviewer is asserted.
Reading results
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also Known As
References
- NCI Thesaurus 26.09d — Antineutrophil Cytoplasmic Antibody (C129400)
- Source: National Cancer Institute, NCI Thesaurus 26.09d, C129400. NCI definition, reproduced without modification under CC BY 4.0.
- Plasma Exchange for Alveolar Hemorrhage in Antineutrophil Cytoplasmic Antibody-Associated Vasculitis: Reframing the Evidence Through Bayesian Analysis. — J Rheumatol, 2026-10-01 (PMID 42542379; literature)
- Management of Antineutrophil Cytoplasmic Antibody-Associated Alveolar Hemorrhage: A Bayesian Reanalysis of the PEXIVAS Trial. — J Rheumatol, 2026-10-01 (PMID 41985923; literature)
- After avacopan: endpoint integrity and glucocorticoid-sparing care in antineutrophil cytoplasmic antibody-associated vasculitis. — Clin Exp Rheumatol, 2026-10-14 (PMID 42873691; literature)
- Real-World Use of Avacopan in Antineutrophil Cytoplasmic Antibody-Associated Vasculitis: Early and Long-Term Clinical, Renal, and Patient-Reported Outcomes in an Italian Rheumatology-Nephrology Network. — ACR Open Rheumatol, 2026-10-01 (PMID 42860759; literature)
- Biopsy-proven Systemic Lupus Erythematosus and Antineutrophil Cytoplasmic Antibody-associated Vasculitis Overlap Syndrome Developed during Propylthiouracil Therapy: A Case-based Review. — Intern Med, 2026-09-29 (PMID 42816391; literature)
- Avacopan in Antineutrophil Cytoplasmic Antibody-Associated Vasculitis: Real-World Safety After Postmarketing Liver Injury Signals. — Arthritis Rheumatol, 2026-09-25 (PMID 42788816; literature)