This is how they find cancer right?!

This is how they find cancer right?

when u go tot he doctor and u take a blood test and the doctors will just check it and if ur blood is normal ur ok but if there is something weard in it than they call u down and ask you to get other tests to confirm and where the cancer is located right?

blood tests aren't the only way cancer is found and doctors dont usually do random blood tests specifically looking for cancer. an example is testing your psa level to test for prostate cancer as a screening one you've reached a certain age. i noticed you've asked a few questions about cancer and seem to be very ill informed if you're really concerned i would speak with your personal doctor since cancer is way to broad to try to explain all the stuff you've asked and are misinformed about in one answer on here.