Chorionic Gonad Beta-Subunit
Label Mnemonic: CGCSF
Epic Lab Code: LAB2857
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
CSF
Collection Medium:
CSF collection kit
Minimum:
0.5 mL CSF
Delivery Instructions:
Submit specimen to laboratory as soon as possible after collection.
Turn Around Time:
1 day upon receipt at reference laboratory
Reference Range:
< 1.0 IU/L

Tumor markers are not specific for malignancy, and values may vary by method.
Interpretive Data:
Elevated levels of human chorionic gonadotropin in spinal fluid indicate the probable presence of central nervous system metastases or recurrence of tumor in patients with germ cell tumors, including patients with testicular cancer or choriocarcinoma.
Comments:
Cautions:
Slight elevations of human chorionic gonadotropin (hCG) in spinal fluid may occur in non neoplastic diseases.

Measurement of hCG in spinal fluid should not be relied upon exclusively to determine the presence of central nervous system metastases in patients with germ cell tumors.

Useful For:
Facilitating diagnosis of brain metastases of testicular cancer or extragonadal intracerebral germ cell tumors.
Methodology:
Electrochemiluminescent Immunoassay
CPT Code:
84702