Cancer Antigen 27-29, Blood (Referred Out) - Saskatoon
Discipline
Biochemistry
Overview
Alias
- CA 27-29
- Breast Carcinoma-Associated Antigen
Specimen Information
Specimen types accepted
- Serum
Specimen collection container
- Preferred Collection Container: Gold (gel)
- Alternative Collection Container: Red (non-gel)
Required volume
- Optimal Volume: 4.5 mL Full collection tube
- Minimum Volume: 1 mL serum
(Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
Transport and stability
- Aliquot of serum must be frozen within 24 hours of collection
Rejection criteria
- Specimens received where the collection protocols were not followed
- Pathology and Laboratory Medicine Acceptance and Rejection Criteria
Testing Information
Clinical interpretation
- Used for early diagnosis of recurring breast cancer and monitoring response to treatment. Other cancers can produce CA 27.29 (colon, liver, lung, pancreatic, ovarian and prostate), but some non-life-threatening conditions may also cause CA 27.29 to show up in blood (ovarian cysts and benign conditions of the breast, liver and kidneys). Having a rise in CA 27.29 levels is a cause for concern only if it is taken in to consideration with other test results that indicate a malignant condition. Serial measurements of CA 27.29 may be useful to monitor disease progression and response to therapy.
Performance
Days/times performed
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Maximum laboratory time
- 7 day turnaround time by testing laboratory
Other information
Forms Required
- Copy of requisition MUST accompany specimen to SPH laboratory
- Fill in the ‘Other tests’ on the Acute Care Phlebotomy Requisition Form #101062
Last Updated: October 8, 2024