Are there any stomach cancer and colon cancer molecular screening tests?

Yes : Colon cancer can be genetic and there a re criteria that can apply and genetic testing is available. There is also a blood level you can check called CEA . For stomach cancer like adenocarcina there is no genetic testing. There are familial syndromes like men that can cause stomach tumors called gastronomas or ze syndrome. If concerned can talk to your doctor. But overall these things very rare.

Some: There are molecular screening tests for colon cancer, but they are most often recommended in patients with a strong family history of colon cancer or in patients diagnosed with colon cancer at a young age. There is a genetic condition that links colon and stomach cancer but the molecular marker is not for stomach per se.