CA 19-9 unit converter
Cancer antigen 19-9 (tumor marker, mainly pancreatic)
Also known as: Cancer antigen 19-9, Carbohydrate antigen 19-9, Sialyl Lewis A, GICA
Converter
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Reference range
| Unit | Adults |
|---|---|
| U/mL = kU/L | 0 – 37 |
Source: Evaluation of CA 19-9 as a serum tumour marker in pancreatic cancer (Br J Cancer 1986, PMC) · Last reviewed: 2026-10-14
Note from the source: Conventional cut-off 37 U/mL. Not suitable for screening: it is raised in jaundice, pancreatitis and other conditions and is absent in people who lack the Lewis antigen. Values differ between assays