I'm so sorry for your loss, Charlene. My dad had a tumor marker over limit last summer, it's a marker for digestive tract, maybe stomach, maybe pancreas. I had him done every test, all come out clear. We re-test the tumor marker every 3 months, his dr. said if the tumor maker goes up significatnly we go through all the tests again. It's now around 40-45, the limit is 36, dr. said if it goes to 100 we re-test. I'm worried so much.