AnaChoice Screen

If the ANAchoice Screen is negative, it generally means that antinuclear antibodies (ANA) are not detected in the blood at significant levels. This can indicate that the symptoms the person is experiencing are less likely to be associated with an autoimmune disorder that typically involves the production of ANAs, such as systemic lupus erythematosus (SLE), Sjögren's syndrome, or rheumatoid arthritis, among others. However, it's important to note that a negative ANA test does not completely rule out the possibility of an autoimmune disease. There are instances where individuals with an autoimmune disease may have a negative ANA test, particularly in the early stages of the disease or in cases where the disease is less active. Additionally, some people with an autoimmune disease might never develop ANAs. Therefore, if the clinical suspicion for an autoimmune disease is high despite a negative ANA test, a healthcare provider may consider repeating the test at a later time or may order additional tests for other autoantibodies that are not detected by the ANAchoice Screen. The diagnosis of autoimmune diseases is complex and typically requires a combination of clinical evaluation, laboratory tests, and sometimes imaging studies to confirm. A negative ANAchoice Screen could also lead to an exploration of alternative diagnoses that could explain the patient's symptoms, as many conditions can mimic autoimmune diseases in terms of symptoms.

If the ANAchoice Screen is positive, it means that there are high levels of antinuclear antibodies (ANA) in the blood. This result suggests that the individual may have an autoimmune disorder, as ANAs are commonly associated with various autoimmune diseases. A positive ANA test prompts additional testing to identify specific antibodies that can help pinpoint the exact autoimmune condition. The pattern and titer of the ANA can provide clues to the diagnosis. Different patterns and titers are associated with different diseases. For example: 1) A homogeneous pattern may suggest systemic lupus erythematosus (SLE), mixed connective tissue disease, or drug-induced lupus. 2) A speckled pattern could be seen in SLE, Sjögren's syndrome, scleroderma, polymyositis, or rheumatoid arthritis. 3) A nucleolar pattern might indicate scleroderma or polymyositis. The reflex tests might include assays for specific antibodies such as dsDNA, which is highly specific for SLE, or other extractable nuclear antigens (ENAs) like Smith (Sm) antibody, Sjögren's-syndrome-related antigen A (SS-A/Ro), and Sjögren's-syndrome-related antigen B (SS-B/La). The presence of ANAs alone is not definitive for diagnosis, as they can be present in healthy individuals, particularly the elderly, or those with infections, other non-autoimmune conditions, or even some medications. Therefore, a positive ANA test must be interpreted in the context of the individual's entire clinical picture, including symptoms and other laboratory findings. A healthcare provider may consider a patient's medical history, physical examination, and any other relevant tests to arrive at a comprehensive diagnosis.