I don't know, Loote bro. While this question could be genuine and so it appears, I encountered similar ethical questions and they did't have concrete answers.

I am not for sure, but he says the patient is going to ( or might?) live for 10 years if s/he is uncured. For instance, those who are infected with AIDS live several years even without treatment. On that ground, I thought s/he would be better off undergoing the treatment little before 10 years and go for the tird option.

The poster of the question wrote the first two options would "deterioate" the condition regardless of adding 2-5 years of life. Maybe mastercard just meant "doing no good" as you said; my closed mind was not really aware and still not sure what actually that is supposed to mean.

Well anyways, I hope s/he founds the best way to get cured!

G'nite!