Hi,
Wow, amazing story of resilience and determination. I'm so sorry to hear about your Scarlet's suffering after all she's gone through.
Does she have swollen lymph nodes? If she's not getting enough fluids, your vet should be able to provide you with saline solution and a trans-dermal drip so you can hydrate her under her skin - I had a cat I kept alive for several years with kidney disease that way.
Does she vomit if you give her a higher level of MMS than 1/4 drop? I don't know if the MMS is helping at this point (1 drop/hour seems like a large dose for a cat, but she was at that level before, I guess). Did you ever try backing off on the MMS after her health started to return?
I don't understand how she can have developed a lymph node cancer with that constant level of ClO2 on a daily basis. With her lack of appetite and possible cancer, the thing that comes to mind for me would be oral whole flower hemp medicine. Anecdotally, people that have been given strong doses of Rick Simpson's "Hemp Oil" when wasting away with cancers have had their appetites return, felt better, and had dramatic remissions. Are you somewhere that you can find such Hemp Oil or a strong tincture of marijuana/hemp flowers? Google Rick Simpson for info on how to make Hemp Oil, or send me a private message at the top of the page if you'd like info on how to make a strong tincture.
My prayers go with you,
Bruce