I had the same treatment protocol as you mention, but many more than 7 rounds of high dose MTX. For the first several months, I want to say I was in the hospital every 2 weeks for four to five days depending how quickly the MTX passed. After doing every other week, I did every four weeks. The whole thing went on for eleven months. I was 55 when I was diagnosed, so slightly younger. I guess the biggest thing is that I was tired all the time. I think every medication I took either gave me constipation or diarrhea. They discussed a stem cell initially, but I responded really well to treatment. It was confirmed by a few different docs that it was not required, and they wanted stem cell as a back up in the event of reoccurrence. As a former patient, I recommend that you are there for him and be positive. The best thing I ever heard from Mayo was that this CNS NHL is curable, so I always knew in the back of my head I’d make it through despite how miserable I may have been on any particular day. Let him do for himself as much as he can as well. There is a lot I don’t remember because I was so very sick. My husband filled in many blanks for me. As a Cancer patient, i just wanted to feel normal and have people treat me normally and not pity me. I also felt guilty because my husband had to give up part of his life to help me. He never said a word about it, so it was a burden I placed upon myself. I know it was unfounded. I hit my five year mark in 2021. Good luck to you and your dad. Feel free to be in touch if you want to talk about anything more specifically.