My wife had a CEA of 0.6 at diagnosis - she has an MLH1/PMS mutation. Immediately after the 12 rounds of chemo, it went up to 1.1, but oncologist told me that was quite a normal occurrence after chemo.
01/17 Wife (44) DX Stage 3b CC Sigmoid, 2/17 positive
MSi-High, presumed Lynch syndrome
02/13 first round of chemo
08/13 done with chemo
Hoping and praying...