Tumor Markers
Normal range < 35 U/mL (< 35 kU/L SI). Specimen: Serum.
Also known as: cancer antigen 125.
This result is reported qualitatively or as a one-sided threshold rather than a two-sided numeric band.
Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for CA-125; those can be narrower than the band shown.
| Specimen | Serum |
|---|---|
| Conventional range | < 35 U/mL |
| SI range | < 35 kU/L |
| Conversion factor | ×1 (conventional → SI) |
| Panel | Tumor Markers |
Convert any CA-125 result between units on the unit converter.
The standard teaching reference range for CA-125 is < 35 U/mL in conventional units, or < 35 kU/L in SI units. This value is measured in serum.
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
Above the range
At the bedside
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Same panel