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Biomarkers · Chemical

CA 125

This test measures the amount of a protein called CA-125 (cancer antigen 125) in a sample of your blood. CA-125 is a type of tumor marker.

CA-125 Blood Test (Ovarian Cancer), MedlinePlus, National Library of Medicine

Also listed as
total calcium, serum calcium, ca, Cancer Antigen 125, ca-125
Primary unit
U/mL
LOINC codes
10334-1
Tests that measure CA 125
Labcorp 5, Quest Diagnostics 3

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, CA 125 with HAMA Treatment 17717

PopulationInterval
CA 125, HAMA Treated<35 U/mL
CA 125, Untreated<35 U/mL

Quest Diagnostics test catalog, 17717

Quest Diagnostics, ROMA™ (Risk of Ovarian Malignancy Algorithm) 91155

PopulationInterval
ROMA Premenopausal<1.31
ROMA Postmenopausal<2.77
CA125<35 U/mL
HE4, Ovarian CA MonitoringNot stated
Female Premenopausal≤70 pmol/L
Female Postmenopausal≤140 pmol/L

Quest Diagnostics test catalog, 91155

Tests

Check the catalog code, specimen, method and preparation for every test that measures CA 125. Select up to five tests to compare them side by side.

Labcorp 5 tests

Single-analyte tests

  • Cancer Antigen (CA) 125 002303

    Serum · Fasting not stated · Turnaround Within 1 day

    Method and collection
    Method
    Electrochemiluminescence immunoassay (ECLIA)
    Preparation
    It is suggested that the assay not be performed until at least three weeks after the completion of primary chemotherapy and at least two months following abdominal surgery.
    Collection
    If a red-top tube is used, transfer separated serum to a plastic transport tube.
    Reference notes
    • Female: 0.0−38.1 units/mL • Male: Not established
    Labcorp catalog page

  • Cancer Antigen (CA) 125 (Serial Monitor) 480061

    Serum · Fasting not stated · Turnaround 1 - 3 days

    Method and collection
    Collection
    If a red-top tube is used, transfer separated serum to a plastic transport tube.
    Labcorp catalog page

  • Cancer Antigen (CA) 125 in the Presence of Human Antimouse Antibodies (HAMA) 144733

    Serum · Fasting not stated · Turnaround 4 - 5 days

    Method and collection
    Method
    Electrochemiluminescence immunoassay (ECLIA)
    Preparation
    It is suggested that the assay not be performed until at least three weeks after the completion of primary chemotherapy and at least two months following abdominal surgery.
    Collection
    If a red-top tube is used, transfer separated serum to a plastic transport tube.
    Reference notes
    • Female: 0.0−38.1 units/mL • Male: Not established
    Labcorp catalog page

Panels that include this biomarker

  • Ovarian Cancer Monitor 081610

    2 analytes · Serum · Fasting not stated · Turnaround 1 - 3 days

    Method and collection
    Method
    HE4: enzyme-linked immunosorbent assay (ELISA); CA 125: electrochemiluminescence immunoassay (ECLIA)
    Collection
    If red-top tube is used, transfer separated serum to a plastic transport tube.
    Labcorp catalog page

  • Ovarian Malignancy Risk (ROMA®) 140045

    4 analytes · Serum · Fasting not stated · Turnaround 1 - 3 days

    Method and collection
    Method
    Electrochemiluminescence Immunoassay (ECLIA)
    Collection
    If a red-top tube is used, transfer separated serum to a plastic transport tube.
    Labcorp catalog page

Quest Diagnostics 3 tests

Single-analyte tests

  • CA 125 29256

    Serum · Fasting not stated · Turnaround Set up: Tues-Sat; Report available: 5 days

    Method and collection
    Method
    Immunoassay (IA)
    Reference notes
    <35 U/mL
    Quest Diagnostics catalog page

Panels that include this biomarker

  • CA 125 with HAMA Treatment 17717

    3 analytes · Serum · Fasting not stated · Turnaround Set up: Mon-Fri

    Method and collection
    Method
    Immunoassay (IA)
    Quest Diagnostics catalog page

  • ROMA™ (Risk of Ovarian Malignancy Algorithm) 91155

    3 analytes · Serum · Fasting not stated · Turnaround Set up: Tues, Thurs (p.m.)

    Method and collection
    Method
    Calculation (CALC) • Chemiluminescent Microparticle Immunoassay (CMIA)
    Collection
    Sample collected in red-top tube must be allowed to clot for at least 30 minutes but no longer than 1 hour.
    Quest Diagnostics catalog page

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Sources

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

Spotted an error? Email hello@biomarkerlens.com with the page URL and the primary source that corrects the entry.