CA 19-9

A CA 19-9 test measures the amount of a protein called CA 19-9 (cancer antigen 19-9) in a sample of your blood. CA 19-9 is a type of tumor marker. Tumor markers are substances made by cancer cells or by normal cells in response to cancer.

Source: MedlinePlus, U.S. National Library of Medicine

Normal range

2 published ranges, each from a named source

37 U/mL drawn: all ages · American Board of Internal Medicine (Laboratory Test Reference Ranges)

Normal: 0–37 U/mL

Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges).

All source ranges (2)

Source	Sex	Age	Range
American Board of Internal Medicine (Laboratory Test Reference Ranges)	All	all ages	0–37 U/mL
ARUP Laboratories Test Directory	All	all ages	<35 u/mL

What an abnormal result can be associated with

A high result: Elevated circulating CA19-9 concentration

Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis: only a clinician can interpret your result in context.

details

Sample: Serum or plasma · LOINC
Listed under: Pancreatic Cancer
Code: LOINC 24108-3 · U/mL
Also known as: Cancer Ag 19-9, CA, Tumor marker

See your own CA 19-9 Add a lab report and it is drawn against your lab's range, over time. Upload a Blood Test