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Anti-Neutrophil Cytoplasmic Antibody (ANCA) Profile – Serum

Published: August 9, 2026Updated: August 16, 2026

This test measures antibodies in your blood that target proteins in neutrophils, a type of white blood cell. These antibodies can indicate certain autoimmune conditions, including inflammatory diseases like vasculitis.

Quick summary

["This test helps identify conditions linked to ANCA-related diseases, which may affect blood vessels and organs."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
22432-9
Short code
N caninum Ab Ser Ql
Synonyms
N caninum Ab Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

This test measures the levels of specific substances in your body, such as cells, proteins, or chemicals, that can show how well certain organs are working and help your healthcare provider evaluate your overall health.

The ANCA test detects the presence of antibodies (specifically anti-proteinase 3 [PR3-ANCA] and anti-myeloperoxidase [MPO-ANCA]) in your serum. These antibodies are linked to specific types of vasculitis, an inflammation of blood vessels that can damage organs. The test is qualitative, meaning it provides a yes/no result for antibody presence rather than precise concentrations.

Your healthcare provider may recommend this test if you have symptoms that need an explanation, if you have a medical condition that requires ongoing monitoring, or as part of a routine checkup to look for problems before they cause noticeable symptoms.

Your healthcare provider may order this test if you have symptoms like unexplained fevers, skin rashes, joint pain, or organ-related issues (e.g., kidney problems, lung inflammation). It’s also used to monitor treatment progress or diagnose conditions like Wegener’s granulomatosis, microscopic polyangiitis, or Churg-Strauss syndrome.

Before the test, follow any instructions your healthcare provider gives you. You may be asked to avoid eating or drinking for a certain number of hours, temporarily stop certain medicines, or drink extra water. Tell your provider about all medications and supplements you take so they can advise you properly.

No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw blood. If you’re on blood-thinning medications, let your provider know before the test.

After the test, you can usually return to your normal activities right away unless your provider tells you otherwise. If a blood sample was taken, a small bandage may cover the site, and mild soreness or bruising is common and typically goes away within a day or two.

You’ll likely feel minor discomfort at the injection site, which may bruise or swell slightly. Apply pressure to the area to help it heal. Avoid strenuous activity for a few hours afterward.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

ANCA Antibody Test

Frequently asked questions

This test is critical for diagnosing ANCA-associated vasculitis, a rare but serious condition where inflammation damages blood vessels. Positive results suggest a higher likelihood of vasculitis, prompting further evaluation (e.g., imaging, biopsy) to confirm the diagnosis and guide treatment. Negative results rule out ANCA-related diseases but don’t rule out other inflammatory conditions.
Most results are ready within a few days, although the exact timing depends on the type of test and the laboratory. Your healthcare provider's office will contact you to discuss the results, or you may be able to view them through your online patient portal.
Results are typically available within 1–3 business days, depending on your lab’s processing schedule. Your healthcare provider will discuss the findings with you during a follow-up visit.
In most cases, drinking plain water is fine and may even be encouraged before the test. However, you should ask your healthcare provider whether you need to avoid food, certain drinks, or specific medications and supplements, since some of these can affect the results.
No dietary restrictions are required, but inform your provider if you’re on blood thinners (e.g., warfarin, aspirin) or have a history of bleeding disorders.
A positive result may indicate an autoimmune condition like vasculitis. Your doctor will likely order additional tests (e.g., imaging, kidney function tests) to determine the exact cause and guide treatment, which may include medications to reduce inflammation or immune system activity.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy