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CA 125, Serum

Test ID: CA125
Orderable by Ontario ND

Test

Aliases/Synonyms

Cancer Antigen 125; CA125; CA-125

Method

Electrochemiluminescent immunoassay (ECLIA)

Platform

Roche Elecsys

Report Includes

CA 125

Specimens

Serum

Clinical Utility

There is no critical value diagnostic of ovarian cancer. High CA 125 may occur in many benign and malignant conditions.

Test Version

11-Jun-2025

Specimen

Specimens

Serum

Sample Volume

1 mL

Collection & Handling

Handling Information

Separate from clot as soon as possible.

Stability

Refrigerated 5 days
Frozen 3 months

Test Version

11-Jun-2025

Performance / Interpretation

Method

Electrochemiluminescent immunoassay (ECLIA)

Platform

Roche Elecsys

Turnaround Time

3 days

Results

Name Units Reference Range Conversion Factor
CA 125 U/mL
  • 0 - 35
  • Two or three fold increase over upper limit may be seen during menses.
Results obtained with Roche Elecsys assay. Results from other manufacturers cannot be used interchangeably.

Test Version

11-Jun-2025

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
CA125 2747CA 125 U/mL

Test Version

11-Jun-2025