Since on chemotherapy , each month in a row cea rising as: august 9.8 oct 8 dec 9 jan 10 colon cancer pt with a liver meta.is this progression ?

No Chage, in reality: CEA values can not be reproduced exactly. So there is some flucctuation which is normal. There is no real difference unless CEA were to increase by 50% or more. Yours did not change, so I would say the tumor is not changing...or it would be called Stable. Therefore, the same treatment can continue unless there is clear cut progression( CEA value of >15-20 ng , in your case)