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Test Code CASF IgG/Albumin Ratio, Spinal Fluid

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

CSF


Advisory Information


The cerebrospinal fluid (CSF) index in which the CSF IgG/albumin ratio is compared to the serum IgG/albumin ratio aids in the diagnosis of individuals with multiple sclerosis. See SFIN / Cerebrospinal Fluid (CSF) IgG Index, Serum and Spinal Fluid.



Specimen Required


Collection Container/Tube: Sterile vial

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
CSF Refrigerated (preferred) 14 days
  Ambient  14 days
  Frozen  14 days

Reference Values

CSF IgG: 0.0-8.1 mg/dL

CSF albumin: 0.0-27.0 mg/dL

CSF IgG/albumin: 0.00-0.21

Day(s) and Time(s) Performed

Monday through Friday; 2 p.m.

CPT Code Information

82042

82784

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

Nephelometry

Secondary ID

8271