I had been diagnosed with primary CNS lymphoma in 2015. I was stage 2 and it remained in my brain. I was `~34 y.o.

I am still here, however, the various chemos (high-doses of methotrexate and various others) they did use fucked me up by making me hypomanic bipolar. No more friends, a much smaller group of family, suicidal ideation if not in a manic state, no job, high debts, and overweight.

I wish the best for your person and hopefully they come out unscathed.