Abstract
Anti-nuclear antibodies (ANAs) are a group of antibodies that are characteristically associated with connective tissue diseases (CTDs). Indirect immunofluorescence antibody technique, having a high sensitivity, is the most common technique used for detection, results of which are expressed in terms of the pattern of fluorescence, substrate used, and the titer of a positive test. Other methods include solid-phase assays. ANA test must be performed only when there is a clinical suspicion of an autoimmune CTD. ANA should not be used as a screening tool for asymptomatic individuals. It is essential in clinical practice to be aware of when to order ANA testing, and how to correctly interpret the test results.
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