Cancer Ag, 19-9

Code

0905

Principle

The CA 19-9 antigen, a Lewis blood group-related mucin, is a tumor-associated antigen synthesized by normal human pancreatic and biliary ductular cells, and gastric, colonic, endometrial and salivary epithelia.Typically, only a minimal amount of the CA 19-9 antigen is present in the blood of normal subjects or subjects with benign disorders. Most patients with carcinoma of the pancreas, however, have elevated levels of blood CA 19-9 antigen.

Preanalytical

1 mL Serum Refrigerated

Turn Around Time

1 day

Methodology

Chemiluminescent immunoassay (CLIA)

Limitations

Patients who have been regularly exposed to animals or have received immunotherapy or diagnostic procedures utilizing immunoglobulins or immunoglobulin fragments may produce antibodies, e.g. HAMA, that interfere with immunoassays.

All results should be interpreted in light of the total clinical presentation of the patient, including: symptoms, clinical history, data from additional tests and other appropriate information.