Blood tests are not a reliable tool in which to diagnose cancer.
This is because there are many reasons for an abnormal blood test.
But blood tests can pick up abnormalities such as anaemia, which can be caused by cancer, such as bowel cancer. Further tests are then needed, such as scans and biopsies, to confirm cancer.
At other times, elevated blood test results may occur not due to cancer but rather due to inflammation or an infection.
I hope this explanation helps.
Please get back to us if you need any more information or support. You may find it helpful to talk things through with one of the nurses on our helpline. The number to call is Freephone 0808 800 4040 and the lines are open from 9am till 5 pm Monday to Friday.
