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Test ID C2729 Breast Carcinoma-Associated Antigen, Serum

Useful For

Serial testing in women with prior stage II or III breast cancer who are clinically free of disease


Predicting early recurrence of disease in women with treated carcinoma of the breast


Indicating that additional tests or procedures should be performed to confirm recurrence of breast cancer


This test is not useful for screening women for carcinoma of the breast.

Method Name

Chemiluminometric Immunoassay

Reporting Name

Breast Carcinoma Assoc Ag(CA 27.29)

Specimen Type


Specimen Required

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Centrifuge and aliquot serum into a plastic vial within 2 hours of collection. Specimens that have not been aliquoted will be canceled.

2. Send refrigerated.

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days
  Frozen  90 days
  Ambient  4 days

Reference Values


≥18 years: ≤38.0 U/mL (use not defined)


≥18 years: ≤38.0 U/mL

Reference values have not been established for patients who are younger than 18 years of age.

Serum markers are not specific for malignancy, and values may vary by method.

Day(s) Performed

Monday through Friday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
C2729 Breast Carcinoma Assoc Ag(CA 27.29) 17842-6


Result ID Test Result Name Result LOINC Value
C2729 Breast Carcinoma Assoc Ag(CA 27.29) 17842-6


If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-General Request (T239)

-Oncology Test Request (T729)