"[CA199] then dropped to normal.
uh, "normal" on CA199 is not really useful discussion for you, since they model it on pancreatic cancer detection. Specific CEA and CA199 value series are the things to compare. Vs CRC detection, response and biology. CA199 probably will drop for a while after heavy chemo to some bottom and then can be useful for detection of rises again. For us, the maintenance and interpretation of CA199 values, "normal" between 18 and 39, with low inflammation, was some the most important territory for about seven years. The actual time series on CA199 measurements were crucial on some occasional critical decisions.
Since you're considered in a chemo later or forever category, how to maximize length of scanned remission and quality of life are big issues.
We strongly believe in continuous chemistry at home
to suppress different avenues of cancer's advance, a lot based on natural chemistry. The real issues - how to, how nice, how effective, and how much. You investigated some on one clinic before, on that Care Oncology Clinic
with drug cocktails [more experience or comments?].
One method, might be immune and anti-inflammation treatments off label, going into integrative medicine with fewer mild drugs and more high powered immune and anti-cancer supplements. I know UK has become problematic to buy high potency supplements since the EU Codex regs, so there's that too. Benefits are serious to us and elsewhere, we order and go out of country for supplies.
Since you are in UK, UFT may still be available; we prefer UFT over Xeloda for immunochemo treatment for quality of life and tx longevity with an actual chemo containing formula. UFT, 5FU and Xeloda might conflict with 1-2 of the COC drugs, like mebendazole.