This test measures the amount of antibodies to anti-Jo-1 in blood. It is used to help diagnose and manage muscle diseases that affects the immune system such as polymyositis (a type of chronic inflammation of the muscles) associated with autoimmune disease. It may also be used when interstitial lung disease is suspected or present
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Presence of Jo-1 antibody is found in patients with pure polymyositis, pure dermatomyositis, or myositis associated with another rheumatic disease or with interstitial lung disease.
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