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Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

minimum sample volume required ~ 5ml

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Test Code: C12

Tube type: SST

Other acceptable tube types
Lithium heparin (pale green)

Special instructions

Reference Range
Please note: following change in method from 10/01/23, there is no change to the decision limit. However patients with known elevated CA125 may have significantly higher results with the new method.

Minimum retesting interval
Test should not be repeated within 7 days


Turnaround Time
2 days

Department: Biochemistry

Clinical Application
CA-125 is a tumour marker for diagnosed ovarian cancer. Its application in screening is limited by sensitivity and specificity. Pre-operative measurement should always be made, and include CEA , as in some rare cases of ovarian cancer this may be elevated when CA125 is not.


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