Cancer Antigen (CA) 27.29

Additional Information:

UFHPL Epic order code: LAB853

Important: Values obtained with different assay methods should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor each patient’s course of therapy. This procedure does not provide serial monitoring; it is intended for one-time use only

CPT Code(s):


Specimen Requirements:

Type: Serum

Container/Tube: gel-barrier tube

  • Separate serum or plasma from cells within one hour of collection.

Sample Volume: 1 mL

Minimum Volume: 0.3 mL (Repeat testing is not possible with this specimen volume.)

Storage: Refrigerate specimens immediately after collection.

Stability (collection to time of analysis/testing):

  • Refrigerated: 5 days
  • Frozen: > 1 month


This test is used to manage patients with metastatic carcinoma of the breast.

For the quantitative determination of CA 27.29 antigen in serum of patients previously treated for stage II or stage III breast cancer. Serial testing for CA 27.29 antigen in patients who are clinically free of disease should be used in conjunction with other clinical methods for the early detection of recurrence.


Immunochemiluminometric assay (ICMA)

Reference Values:

0 – 38.6 units/mL