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Catalog ID BHSF Beta-Human Chorionic Gonadotropin, Quantitative, Spinal Fluid

Reporting Name

Chorionic Gonad Beta-Subunit QN,CSF

Useful For

Aiding in the diagnosis of brain metastases of testicular cancer or extragonadal intracerebral germ cell tumors

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Specimen Required

Patient Preparation: For 12 hours before specimen collection, do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.

Container/Tube: Sterile vial

Specimen Volume: 1 mL

Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
CSF Refrigerated (preferred) 28 days
  Ambient  14 days
  Frozen  14 days

Reference Values

<1.0 IU/L

Day(s) and Time(s) Performed

Monday through Friday; 6 a.m.-12 a.m.

Saturday; 6:30 a.m.-5 p.m.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
BHSF Chorionic Gonad Beta-Subunit QN,CSF 14041-8


Result ID Test Result Name Result LOINC Value
BHSF Chorionic Gonad Beta-Subunit QN,CSF 14041-8

Reject Due To

Hemolysis Reject

Method Name

Electrochemiluminescent Immunoassay

Secondary ID