Pancreatic cancer laboratory tests: Difference between revisions
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Revision as of 04:12, 9 May 2013
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Pancreatic cancer Microchapters |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
Overview
Pancreatic cancer is a malignant tumour within the pancreatic gland. Each year about 33,000 individuals in the United States are diagnosed with this condition, and more than 60,000 in Europe.
Laboratory Findings
The doctor may take blood, urine, and stool samples to check for bilirubin and other substances. Bilirubin is a substance that passes from the liver to the gallbladder to the intestine. If the common bile duct is blocked by a tumor, the bilirubin cannot pass through normally. Blockage may cause the level of bilirubin in the blood, stool, or urine to become very high. High bilirubin levels can result from cancer or from noncancerous conditions.
Liver function tests can show a combination of results indicative of bile duct obstruction (raised conjugated bilirubin, γ-glutamyl transpeptidase and alkaline phosphatase levels). CA19-9 (carbohydrate antigen 19.9) is a tumor marker that is frequently elevated in pancreatic cancer. However, it lacks sensitivity and specificity. When a cutoff above 37 U/mL is used, this marker has a sensitivity of 77% and specificity of 87% in discerning benign from malignant disease. CA 19-9 might be normal early in the course, and could be elevated due to benign causes of biliary obstruction.[1]
References
- ↑ Frank J. Domino M.D.etc. (2007). 5 minutes clinical suite version 3. Philadelphia, PA: Lippincott Williams & Wilkins.