An Anti-SS-B (La) Antibody test is a blood analysis used to diagnose systemic autoimmune diseases, specifically Sjögren’s Syndrome and Systemic Lupus Erythematosus (SLE).
The “SS-B” stands for Sjögren’s Syndrome B. This antibody is almost always tested alongside Anti-SS-A (Ro) because they are “linked” markers; it is very rare to find Anti-SS-B without Anti-SS-A also being present.
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