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Rheumatoid Factor, CSF
Test CodeRACSF
Alias/See Also
17407
CPT Codes
86431
Preferred Specimen
1.5 mL CSF in sterile transport tube
Minimum Volume
1 mL
Instructions
Freeze immediately, and ship frozen.
Transport Temperature
Frozen
Specimen Stability
Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Methodology
Immunoturbidimetry
Setup Schedule
Set up: Daily; Report available: Next day after receipt at the performing laboratory. Add two (2) days for transport.
Reference Range
≤7 IU/mL
Clinical Significance
Central nervous system vasculitis is a rarely described complication of rheumatoid arthritis. As with rheumatoid vasculitis in general, the cause of CNS vasculitis in rheumaroid arthritis (RA) is unknown.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
Last Updated: June 22, 2023