Lab Test

Cancer Antigen 27 29

Cancer Antigen 27.29, Breast Carcinoma-Associated Antigen, CA 27.29

Test Codes

WARDE: C2729, EPIC: LAB6794, SOFT: X2729

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and frozen (-20°C/-4°F or below).

Preparation for Courier Transport

Transport: 1.0 mL serum, frozen (-20°C/-4°F or below). (Minimum: 0.4 mL)

Rejection Criteria

  • Grossly hemolyzed specimens.
  • Lipemic specimens.
  • Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to plastic transport tube and frozen (-20°C/-4°F or below).

Transport: 1.0 mL serum, frozen (-20°C/-4°F or below). (Minimum: 0.4 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 8 hours
Refrigerated (2-8°C or 36-46°F): 72 hours
Frozen (-20°C/-4°F or below): Undetermined

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Warde Medical Laboratory, Ann Arbor, MI.

Performed

Monday – Friday.
Results available in 2-5 days.

Reference Range

Less than 38.6 U/mL.

Test Methodology

Chemiluminescence Immunoassay.

Interpretation

Results cannot be interpreted as absolute evidence of the presence or absence of malignant disease and should always be used in conjunction with other diagnostic and clinical procedures.

This test should NOT be used for screening and should NOT be used interchangeably with other assay methods.

Clinical Utility

The CA 27.29 assay is used as an aid in monitoring patients previously treated for stage II or III breast cancer. Serial testing in conjunction with other clinical methods is used for early detection of cancer recurrence and the management of metastatic breast cancer treatment.

CPT Codes

86300
LOINC:  17842-6

Contacts

Last Updated

10/4/2022

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