Anti-La (SS-B) Ab (RDL)

Optimal Result: 0 - 20 Units.

The Anti-La (SS-B) Antibody test is an important diagnostic tool for autoimmune disorders. This test specifically detects antibodies against the La (or SS-B) antigen, which is another key protein target in certain autoimmune diseases. The presence of Anti-La (SS-B) antibodies is closely associated with Sjögren's syndrome, a condition characterized by dry eyes and mouth due to immune-mediated damage to moisture-secreting glands.

These antibodies are also seen in patients with systemic lupus erythematosus (SLE), though less commonly than in Sjögren's syndrome. The detection of Anti-La (SS-B) antibodies is particularly significant in the diagnosis of Sjögren's syndrome, as they are one of the primary serological markers for the disease. In pregnant women with autoimmune conditions, these antibodies are relevant due to their potential association with complications in the fetus, such as neonatal lupus and congenital heart block, similar to Anti-Ro (SS-A) antibodies. However, as with other autoimmune antibody tests, the presence of Anti-La (SS-B) antibodies should be interpreted in the context of the patient's overall clinical symptoms and other laboratory findings, as they can sometimes be present in individuals without any autoimmune disease.

What does it mean if your Anti-La (SS-B) Ab (RDL) result is too high?

Elevated Anti-La (SS-B) antibody levels are primarily indicative of Sjögren's syndrome, serving as a key marker for this autoimmune disorder that affects moisture-secreting glands. They are also associated with Systemic Lupus Erythematosus (SLE), though less frequently than with Sjögren's syndrome. In pregnant women with these antibodies, there is an increased risk of fetal complications, including neonatal lupus and congenital heart block. However, elevated Anti-La (SS-B) levels are not exclusively associated with autoimmune conditions and can be present in some individuals without any autoimmune disease. Therefore, interpreting these levels requires considering the patient's overall clinical symptoms, medical history, and other laboratory findings to ensure an accurate diagnosis and appropriate management.

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