CA 19-9

Overview
Department	Biochemistry
Test Code	C199
Synonyms	C199 C19-9 19-9
Test Availability	Tuesdays and Fridays Contact the laboratory if testing required urgently.
Turnaround Time	1 – 4 days
Stability – Add test
Specimen Requirements
Specimen	Serum Plasma
Preferred	7mL Red-Top
Acceptable	SST Yellow-Top
Unacceptable
Specimen Transportation
Paediatric Requirements	0.5 Red microtainer
Aliquot Requirements
Sample	Serum
Preferred Volume	>500 uL
Minimum Volume	200 uL
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
Used for monitoring gastrointestinal malignancies  For the serial monitoring of tumours, tumour markers should be tested in the same laboratory.