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Department of Pathology

Cancer Antigen 27.29 (087-3751)

Synonyms: BR

CPT Code(s): 86300

Test Order Mnemonic: CA 27.29 (Medicare NCD.)

Applies To: Cancer Antigen  27.29 (CA 27.29) is an vitro diagnostic test for the quantitative serial determination in human serum.  The test is intended for use as an aid in monitoring patients previously treated for Stage II or Stage III breast cancer.

Test Includes:

Request Form: Special Chemistry Form 2

Collection: Routine venipuncture

Storage InstructionsCentrifuge, store serum at 2-8º C and deliver to lab within 24 hours.  If delayed more than 24 hours, freeze  serum.

Causes for Rejection: Hemolysis

Availability: Samples are received 24 hours per day.

Turnaround Time: STAT 1 hour, Routine 4 Hours

Special Instructions: N/A

Specimen: Blood or serum

Volume: 7mL blood 

Minimum Volume0.4 mL serum

Container: SST/gel barrier tube or plain red-stopped tube

Reference Range0.0-38.6 U/mL

Therapeutic Range

Critical Values

Test MethodologyChemiluminescence

Interfering SubstancesHeterophilic antibodies in human serum can react with reagent I immunoglobulins interfering with in vitro immunoassays.  Patient routinely exposed to animals or to animal serum products can be prone to this interference and anomalous values may be observed.

Reviewed: April 2008 by  D. Davis, MT(ASCP)

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