I was diagnosed with lymphoma about 8 years ago. It's been undetectable since six months later, and I haven't had any treatment since the three years of chemo ended, but that's not to say it won't return.
I've always disliked the "winning/losing" paradigm, and also terms like "struggle" and "battle". To me, they all imply that there was or is something that I personally could have done to change the outcome. If I hadn't been fortunate enough to respond well the treatment, that I'd "lost" or "didn't fight hard enough."
I'm grateful to the physicians and scientists who devised my treatments, and to the doctors and nurses who cared for me. I myself played no part in any of this, though. A freak genetic accident caused an affliction, and I followed the prescribed script. I never once felt that I was battling something, or that I had to try harder. I don't feel like I've won anything. If it returns, I won't feel that I've lost anything or that I have to try harder. If it returns and I die, it won't be because I've given up or didn't fight enough. It will be because the currently available solutions to this problem are insufficient for the particular conditions of my body.
My condolences to Alex and his loved ones.