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N-methyl-D-Aspartate Receptor Antibody, IgG

Item Value
Available Stat? No
Test code NMDS
Performed by ARUP
Sendout? YES
Method Semi-Quantitative Indirect Fluorescent Antibody
Container type GOLD/RED TOP TUBE
Amount to Collect 2 ML
Sample type SERUM
Preferred volume 1 ML
Min. Volume 0.15 ML
Processing notes CENTRIFUGE AND ALIQUOT SERUM. TRANSPORT TO CB FROZEN. ORDER ARUP TEST CODE 2004221.
Ref Lab Rejection Criteria CSF or plasma. Contaminated, hemolyzed, or severely lipemic specimens.
Units TITER
Normal range <1:10
Synonyms NMDA, NMDA-R
Stability After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Turn around times 2-6 DAYS
Reflex? If NMDA antibody IgG is positive, then an NMDA antibody IgG titer is reported. Additional charges apply.
Additional information Anti-NMDA receptor IgG antibody is found in a subset of patients with autoimmune limbic encephalitis and may occur with or without associated tumor. Decreasing antibody levels may be associated with therapeutic response; therefore, clinical correlation must be strongly considered. A negative test result does not rule out a diagnosis of autoimmune limbic encephalitis.
CPT coding 86255-90, 86256-90
LOINC code 80221-5
Last Updated 10/12/2016 3:14:45 PM
Entry Number 1760
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