SS-B/LA IS AN EXTRACTABLE NUCLEAR ANTIGEN WITH ANTIBODIES OCCURING IN PATIENTS WITH SJOGREN S SYNDROME (60%) & LUPUS ERYTHEMATOSUS (15%). THIS ASSAY IS USEFUL FOR EVALUATING PATIENTS WITH SIGNS AND SYMPTOMS OF CONNECTIVE TISSUE DISORDER IN WHOM ANA IS POSITIVE.
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2 ML (1 ML MIN.) SERUM FROM 1 SST. SHIP REFRIGERATED OR FROZEN. OVERNIGHT FASTING IS PREFERRED.