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Extractable Nuclear Antigen


An extractable nuclear antigen (ENA) screen looks for the presence of one or more autoantibodies in the blood that react with proteins in the cell nucleus.

Autoantibodies are produced when the immune system mistakenly targets and attacks the body's own tissues which can cause inflammation, tissue damage and symptoms associated with an autoimmune disorder.

The results of an ENA screen can help to detect and distinguish between different autoimmune disorders.