Carbohydrate Antigen (CA) 19-9
Fasting Required: No

Specimen: Blood

Results: 3-5 Business days

Description:
CA 19-9 is elevated in about 70% of people with advanced pancreatic cancer, but it may also be elevated in other cancers, conditions, and diseases such as colorectal cancer, lung cancer, gallbladder cancer, bile duct obstruction (e.g., gallstones), pancreatitis, cystic fibrosis, and liver disease.

Methodology:
Immunoassay (IA)

Limitations:
CA 19-9 is absent in individuals with blood group Lewis Le(a-b-), as observed in approximately 5% of Caucasian and 20-25% of African American patients.

Reference Range(s):
<34 U/mL
This test was performed using the Siemens chemiluminescent method. Values obtained from different assay methods cannot be used interchangeably. CA 19-9 levels, regardless of value, should not be interpreted as absolute evidence of the presence or absence of disease.

Alternative Name(s):
Carbohydrate Antigen 19-9

Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.