CA 19-9

Overview
Department	Biochemistry
Test Code	C199
Synonyms	C199 C19-9 19-9
Turnaround Time	1 – 4 days
Specimen Requirements
Specimen Type	7mL red top or SST yellow top
Specimen Transportation
Preferred
Pediatric Requirements	0.5 red microtainer
Stability – Add test
Aliquot Requirements
Sample Type	>500 uL Serum
Minimum Volume	200 uL Serum
Aliquot Transportation	Samples should be separated from red cells within 24hrs of collection.
Clinical Information
Reference Intervals	<37 U/mL
Test Method	Abbott Architect analyser using Abbott reagents.   CMIA method
Advanced Notice
Patient Preparation
Comments
Tested Tuesdays and Fridays.  Please contact the laboratory if testing required urgently.  Used for monitoring gastrointestinal malignancies  For the serial monitoring of tumours, tumour markers should be tested in the same laboratory.