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Rheumatoid Factor (RF), reflex
Test CodeRF
Preferred Specimen
Serum
Instructions
If positive, titer performed at an additional charge
Transport Container
SST tube
Transport Temperature
Refrigerated
Reference Range
See report for normal ranges.
Clinical Significance
Rheumatoid factors may be found in scleroderma, lupus erythematosus, hepatitis, hypergammaglobulinemia, and Sjogren's syndrome.