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WikiDoc Resources for CA-19-9


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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


CA-19-9 is a tumor marker.


CA 19-9 is elevated in most patients with advanced pancreatic cancer, but it may also be elevated in other cancers, conditions, and diseases such as colorectal cancer, lung cancer, gallbladder cancer, gallstones, pancreatitis, cystic fibrosis, and liver disease.

Other causes of bile duct obstruction may also cause very high CA 19-9 levels, which fall when the blockage is cleared.

If the bile ducts are blocked, wait a week or two after the blockage is removed or treated to check CA 19-9 levels.

Differential Diagnosis

In alphabetical order. [1] [2]

Increased level of CA-19-9

Malignant Diseases

Non-Malignant Diseases

Related chapters


  1. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
  2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X

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