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Immunoassay reagents intended to perform qualitative and/or quantitative analyses of a sample of body fluids (e.g, serum) to determine CA 19-9, a blood-group carbohydrate-related tumor marker. The detection of the tumor marker CA 19-9 is mostly in diagnosis and monitoring of colorectal and pancreatic carcinomas; this assay has also been used for diagnosis of cholangiocarcinoma.
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