High ferritn levels 650+ and i have always had colon issues pre-cancer polyps. test every 2 years. can ferritin indicate cancer?

Ferritin: High ferritin can be due to iron overload or any form of chronic or acute inflammation including infections but not usually a marker for malignancy. People who have a genetic disorder leading to excessive iron absorption called Hemochromatosis do have an increased incidence of liver cancer. If this is a possibility you should have further iron tests to rule it out.