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Cancer Antigen 19-9
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Cancer Antigen 19-9
, CA 19-9
Pathophysiology
Cancer Antigen 19-9 is expressed in pancreatic disease and hepatobiliary disease
Indications
Pancreatic ductal adenocarcinoma
Confirms diagnosis
Predicts prognosis as well as recurrence risk
Not indicated for screening in asymptomatic patients
No tumor specific (see efficacy below)
Causes
Increased CA 19-9
Pancreatic Ductal Adenocarcinoma
Chronic Pancreatitis
Chronic inflammatory states
Efficacy
Pancreatic Ductal Adenocarcinoma
Test Sensitivity
: 50-75%
Test Specificity
: 80-85%
References
Safi (1987) Pancreas 2(4): 398-403 [PubMed]
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