Specimen Serum Special Instructions Only available to Directorate of Medicine Units U/mL Reference Range 0- 34 U/mL Test Usage CA 19.9 is a tumor-associated antigen, originally isolated from a human colon cancer cell line. It is present on gangliosides in tissues, but is carried by glycoproteins in serum. The oligosaccharide, bearing the CA 19.9 antigen, […]
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