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Additional Codes
LAB9640
Performing Laboratory
Washington University School of Medicine
Methodology
Enzyme-Linked Immunosorbent Assay (ELISA)
Specimen Requirements
Specimen Type: Blood
Container/Tube: Red top
Specimen Volume: 5 mL
Specimen Minimum Volume: 3 mL
Specimen Transport Temperature
Refrigerate/Frozen NO
Day(s) Test Set Up
Monday through Friday
Turnaround Time:
Routine: 2 to 3 weeks
Reference Values
Negative
Positive results:
IgM vs Sulfatide > 10,000 +
Low IgM vs Histone H3 +
IgM M-protein
Clinical correlation:
Sensory-motor neuropathy
±Gait Δ (GALOP)
Demyelination
Specificity: 85%
IgM vs Sulfatide > 5,000 +
Low IgM vs Histone H3 +
No M-protein
Clinical correlation:
Sensory neuropathy
Axonal
Specificity: 85%
IgG vs Sulfatide > 6,000 +
Low IgG vs GM1
Clinical correlation:
Sensory neuropathy
Specificity: 80%
Test Classification and CPT Coding
86255 x 2-Screen
86256 x 2-Titer