![Ovacome - the ovarian cancer support charity on X: "Tumour markers are substances produced by some cancers that can be measured in the blood. A tumour marker for ovarian cancer is CA125. Ovacome - the ovarian cancer support charity on X: "Tumour markers are substances produced by some cancers that can be measured in the blood. A tumour marker for ovarian cancer is CA125.](https://pbs.twimg.com/media/GIkbDDRXIAAOELO.jpg)
Ovacome - the ovarian cancer support charity on X: "Tumour markers are substances produced by some cancers that can be measured in the blood. A tumour marker for ovarian cancer is CA125.
![Serum tumor markers: part II--practical considerations and limitations of testing. | Semantic Scholar Serum tumor markers: part II--practical considerations and limitations of testing. | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/6c83a32dd5fb991a743949b852f62aee919fb170/2-Table1-1.png)
Serum tumor markers: part II--practical considerations and limitations of testing. | Semantic Scholar
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