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      • Your healthcare provider will talk to you about the test results and what they mean for you. If the results are negative, then you likely don’t have autoimmune vasculitis. If the results are positive, you may be diagnosed with autoimmune vasculitis. Your healthcare provider may order additional tests, such as a biopsy or more bloodwork.
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  1. Mar 11, 2022 · If the results are positive, you may be diagnosed with autoimmune vasculitis. Your healthcare provider may order additional tests, such as a biopsy or more bloodwork. And they’ll consider many other factors to make an accurate diagnosis.

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  3. A negative result means that no ANCAs were found in your blood sample. Your symptoms probably aren't caused by autoimmune vasculitis. A positive result means that ANCAs were found in your blood sample. This may mean you have autoimmune vasculitis. Your test results will also show which type of ANCAs were found.

  4. Aug 11, 2024 · Positive ANCA lab results with clinical suspicion aid in diagnosing some small vessel vasculitis, including pauci-immune small vessel vasculitides granulomatosis with polyangiitis, microscopic polyangiitis, eosinophilic granulomatosis with polyangiitis and anti-glomerular basement disease.

    • Noman Khalid, Narothama R. Aeddula
    • 2023/08/14
  5. Aug 11, 2021 · An ANCA test was performed and returned with a positive result, reported as: “P-ANCA positive. The titer of P-ANCA cannot be reliably determined due to interference from positive ANA staining at a titer of 1:20 on IFA slides.”

    • Sara Shahid, Syed H. Alam, Lillian Gaber, Salman Ahmed
    • 10.7759/cureus.17094
    • 2021
    • Cureus. 2021 Aug; 13(8): e17094.
  6. May 31, 2024 · Up to 80% of the people with ulcerative colitis will have a positive ANCA test. Your doctor will explain the meaning of your test results to you.

  7. Nov 13, 2019 · Positive test results for ANCA, PR3, and/or MPO help support a diagnosis of systemic autoimmune vasculitis and distinguish between different types of vasculitis. However, to confirm a diagnosis, a biopsy of an affected site is often required.

  8. If an ANCA test result is positive, then an additional test is performed to determine the amount of antibody present. This is called a titre. To determine the titre, a serum sample is diluted in steps and each dilution is tested for the presence of the antibody.

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