CA 19.9 (Cancer antigen-Pancreas 19.9)

Clinical definition of the CA 19.9 test
Cancer antigen 19.9(CA 19.9) is a protein that exists on the surface of certain cancer cells. CA 19.9 is elevated in pancreatic cancer. CA 19.9 test is used in the diagnosis of gastritis, abdominal pains, and gas and to monitor treatment and reoccurrence of pancreatic, gastrointestinal, stomach and gynecological cancers. Moderate to high levels of CA 19.9 are an indicator of pancreatitis and cirhossis of liver.

Why is the CA 19.9 test done?
CA 19.9 is carried out

  • To differentiate between cancer of the pancreas and other conditions, such as pancreatitis
  • To monitor a person's response to pancreatic cancer treatment and/or cancer progression
  • To watch for pancreatic cancer recurrence

What are the common signs/symptoms when the CA 19.9 test is done?

  • Abdominal pain
  • Nausea
  • Weight loss
  • Jaundice
  • Gastritis
  • Gas

Who should do the CA 19.9 test (Target population)?
Persons showing the above signs & symptoms and symptoms that may be indicate pancreatic cancer.

What should I do before the CA 19.9 test?

Specimen type

Specimen collection procedure

Preparatory instructions before the test *

Serum (Blood Sample)


Collection of blood from a vein, usually from the arm.

No Fasting Required.

No other special preparations required.

*Subjects suffering from any illness or on oral or injectable medications are advised to consult their physician prior to requesting any tests or procedures.

How do I interpret my CA 19.9 test results?

Reference Range*


00 to 30.9 U/ml **


‘*A Reference range is a set of values which helps the healthcare professional to interpret a medical test. It may vary with age, gender, and other factors. Reference ranges may also vary between labs, in value & units depending on instruments used and method of establishment of reference ranges’

Diseases/conditions related to the CA 19.9 test

  • Colorectal cancer
  • Lung cancer
  • Gall bladder cancer
  • Bile duct obstruction (Gallstones)
  • Pancreatitis
  • Cystic Fibrosis
  • Liver disease
  • Cancer of the exocrine pancreas
  • Pancreatitis  
  • Cirrhosis of the liver
  • Hepatobiliary cancer

Other tests related to the CA 19.9 test

  • Bilirubin
  • Liver panel
  • Tumor markers
  • Carcinoembryonic antigen (CEA)
  • Bilirubin

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CA 19.9