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What is a Extractable Nuclear Antigen-18 Antigens (ENA/ANA Quantitative)?

The **Extractable Nuclear Antigen (ENA) – 18 Antigens (ANA Quantitative)** test is a specialized blood test that measures the levels of autoantibodies directed against 18 specific nuclear antigens. Unlike qualitative testing, which only detects presence or absence, the quantitative version provides exact antibody concentrations. This helps clinicians assess the severity of autoimmune connective tissue diseases such as lupus, Sjögren’s syndrome, scleroderma, and mixed connective tissue disease. It is particularly useful for monitoring disease activity, guiding treatment decisions, and evaluating patient response over time.

Additional Information

Also known as/ Other names: ENA Profile 18 Antigen Panel, Extractable Nuclear Antigen Antibody Panel, ANA ENA Quantitative Profile, Comprehensive ENA Antibody Panel
Parameters: 17
Recommended for: M/F/Others
Sample Type: Blood
Patient Preparation: No prior preparation is needed
Reports: Next Day

FAQs

What does a high antibody level mean?

High levels suggest active autoimmune disease or flare-up, requiring medical evaluation and possible treatment adjustment.

What does a low antibody level mean?

Low levels may indicate controlled disease or effective treatment, but clinical monitoring remains essential.

Who should undergo this test?

Patients with unexplained joint pain, rashes, fatigue, or suspected autoimmune connective tissue disorders benefit from this test.

How long does it take to get results?

Results are usually available within a few days, depending on the laboratory’s processing time.

Can this test diagnose lupus?

Certainly, antibodies like anti-Smith and anti-RNP are strongly associated with lupus and can be quantified.

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