CA 19.9
Carbohydrate antigen 19.9, Cancer Antigen 19.9
Why do we do this test?
To monitor response to pancreatic cancer treatment, and for long term follow up to detect recurrences. Sometimes to assist in the diagnosis. But not all patients with cancer pancreases will have elevated CA 19.9.
CA 19.9 can be elevated in other cancers and conditions as well such as gall bladder and bile duct cancers, colorectal and gastric cancers, ovarian, lung and liver cancers, bile duct obstructions, pancreatitis, cystic fibrosis and liver diseases.
Specimen Type
Serum, Plasma (EDTA), Plasma (Li Heparin)
Instructions for specimen collection & Patient preparation
Specimen transportation & Processing
Separate serum as soon as possible. Transport separated serum/plasma in ice
(2-8 C)
Specimen storage & stability
For prolonged storage keep frozen at -20C. If analysis within 5 days stable at 0C.
Specimen storage duration
Reference Intervals & Target Values
< 37 U/ml
Critical Limits
Possible Pre-analytical Errors
Gross Haemalysis
Possible Analytical Errors
Insufficient serum/plasma volume, Air bubbles, Fibrin clots.
Available Government Laboratories
Apeksha Hospital,Medical Research Institute, Karapitiya Teaching Hospital
Recommended turnaround time
1 to 7 days

Test Method


1. Daniel W.Chan, Stewart Sell; Tumour Markers. Burtis CA, Ashwood ER. Tietz Text Book of Clinical Chemistry,3rd edition, USA, Elsevier Saunders 1999, 722-749

Last Updated : 2020-09-23 03:13:02






College of Chemical Pathologists of Sri Lanka

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