I hope everything goes ok for your mom. My Dr says the same about the cea level now. This is frustrating as when first diagnosed he said the opposite. I have a cea now of 8 and originally it was 0 I had a pet scan this past thursday and have an E.R.C.P on this tuesday they plan to go through bile duct into liver to biopsy a hard to reach lesion. One of three new ones since November. Just very frustrated as I am sure you and your Mom are. Good luck.. James