1. 
   CA 19-9
   CA 19–9: A tumor marker initially found in colorectal cancer patients, but subsequently also identified in patients with pancreatic, stomach, and bile duct cancer. In those who have pancreatic cancer, higher levels of CA 19–9 tend to be associated with more advanced disease. Noncancero...
   Found op http://www.medterms.com/script/main/art.html?articlekey=39197
   
   
2. 
   CA 19-9
   <protein, tumour marker> Sialylated lewis blood group carbohydrate antigen found in many adenocarcinomas of the digestive tract, especially pancreatic tumours. ... (12 Dec 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?CA+19-9
   
   
3. 
   CA 19-9
   A substance released into the bloodstream by both cancer cells and normal cells. Too much CA 19-9 in the blood can be a sign of pancreatic cancer or other types of cancer or conditions. The amount of CA 19-9 in the blood can be used to help keep track of how well cancer treatments are working or if ...
   Found op http://www.cancer.gov/dictionary?expand=C
   
   
4. 
   CA19-9
   A chemical marker produced by some types of cancer, which can be found in the blood. It is sometimes found in people who have suspected pancreatic cancer, but is not specific enough to use as a screening test.
   Found op http://www.cancerhelp.org.uk/utilities/glossary/index.htm?search=c
   
   

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