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Test Code CA125 Cancer Antigen 125 (CA125), Serum

Important Note

The CA 125 assay is not recommended as a screening test for cancer, but rather as an aid in monitoring response to therapy for patients with epithelial ovarian cancer. Serial testing for patients CA 125 assay values should be used in conjunction with other methods used for monitoring ovarian cancer.

Do not interpret levels of CA 125 as absolute evidence of the presence or the absence of malignant disease. 

Result determined by the Siemens Centaur XP Chemiluminometric Immunoassay

CA 125 antigen levels in a given specimen determined with assays from different manufacturers can vary and cannot be used interchangeably.

Specimen Collection Requirements

Cancer Antigen 125 (CA125), Serum

Alternate Test Name: Carbohydrate Antigen 125, OV Monitor, Ovarian Cancer-Related Antibodies, CA 125
Dept: Chemistry
SPECIMEN COLLECTION REQUIREMENTS
Collection Container:

SST
Specimen: Serum
Transport Temperature: Room Temperature
Specimen Volume: Preferred Volume: 1 mL; Minimum Volume: 0.5 mL
Also Acceptable: Red Top Tube
TECHNICAL SPECIFICATIONS
Performed: Monday - Saturday
Reported: Same Day
Methodology: Chemiluminescence
CPT: 86304
LOINC: 10334-1
Stability: Room Temperature: 8 hours; Refrigerated: 24 hours; Frozen: 6 months
Reference Range:

< 30.2 U/mL