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What is this test?

The centrosomal nuclear antibody test is a blood test that looks for special proteins (antibodies) in your blood. These antibodies target parts of your cells called the centrosome and nucleus. The centrosome helps organize the cell's framework, while the nucleus contains the cell's genetic material. When your immune system mistakenly makes antibodies against your own cell structures, it can signal an autoimmune disease.

How is the test performed?

A healthcare provider will draw a small blood sample from your arm using a needle. This sample is then sent to a laboratory where technicians use a technique called immunofluorescence. In this method, your blood is mixed with special markers that glow under a microscope. If antibodies are present, they bind to these markers and become visible, allowing lab staff to see the pattern and measure the amount (titer) of antibodies.

What do the results mean?

Results are reported as a titer, such as 1:40 or 1:160. The second number represents how many times the blood sample was diluted before antibodies could still be detected. Higher titers (like 1:160) generally indicate stronger antibody presence. A positive result (antibodies detected) suggests your immune system may be attacking your own cells, which is characteristic of autoimmune diseases. However, the result alone does not diagnose a specific condition—your doctor will consider it along with your symptoms and other test results.

Do I need to prepare for the test?

No special preparation is needed. You can eat and drink normally before the test. However, tell your doctor about any medications, supplements, or health conditions you have, as these may affect results. The test simply requires a routine blood draw, which takes only a few minutes.