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Lab Dept:
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Chemistry
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Test Name:
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CA 125
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General Information
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Lab Order Codes:
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C125
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Synonyms:
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Cancer Antigen 125
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CPT Codes:
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86304 – Immunoassay for tumor antigen; other antigen, quantitative
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Test Includes:
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Cancer Antigen 125 level reported in U/mL.
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Logistics
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Test Indications:
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Evaluating patients' response to cancer therapy, especially for ovarian carcinoma. Predicting recurrent ovarian cancer or intraperitoneal tumor.
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Lab Testing Sections:
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Chemistry - Sendouts
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Referred to:
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Mayo Medical Laboratories (Test# 9289)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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1 - 3 days, test set up daily
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Whole blood
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Container:
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Red top tube
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Draw Volume:
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3.0 mL (Minimum: 0.6 mL) blood
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Processed Volume:
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1.0 mL (Minimum: 0.2 mL) serum
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Collection:
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Routine venipuncture
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Special Processing:
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Lab Staff: Centrifuge specimen, remove serum aliquot. Freeze specimen in plastic screw-cap vial. Store and ship frozen. Forward promptly.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimen, warm specimens
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Interpretive
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Reference Range:
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<35 U/mL
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Critical Values:
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N/A
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Limitations:
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Not useful as a screening assay for cancer detection in the normal population. Results cannot be interpreted as absolute evidence of the presence or absence of disease. Serum markers are not specific for malignancy and values may vary by method.
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Methodology:
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Automated immunoassay Abbott Axsym.
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Contraindications:
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N/A
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References:
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Mayo Medical Laboratories Web Page (June 2006) http://www.mayoreferenceservices.org/mml/mml-test.asp
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