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A new blood test for fibromyalgia is more accurate than previously thought and will not confuse the chronic pain disorder with other diseases such as lupus and rheumatoid arthritis, according to th…

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"The results that were uncovered via our research have finally been able to “tear back the curtain” and reveal that there is a specific pathway in fibromyalgia – and it defines fibromyalgia as an immunologic medical disorder. This disorder relates to the production of protein molecules called cytokines by a certain type of white blood cell. And the identification of this pathway has created the first objective test capable of making the diagnosis of fibromyalgia."

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The frequency of positivity on ANA screening test (on Hep-2 cells) is as follows: Mixed connective tissue disease: 100% Drug-induced lupus erythematosus: 100% Systemic lupus erythematosus: 95%-100% Sjögren syndrome: 80% Scleroderma: 60%-95% Polymyositis-dermatomyositis: 49%-74% Rheumatoid arthritis: 40%-60% Normal: Less than 4%

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