Awe, sorry to hear that NIKK
My Mom had lung cancer back in the 80s, gave her 6 months.
She lived 2 1/2 years.
They used to give that Laetrile treatment in Mexico made from the pits of apricots, so I made her drink apricot nectar. She never took chemo, but did do radiation.
I have seen that new drug Truda, that when used with chemo, you live longer, so they say, can get a lot of complications from it though.
So sad, prayers for your friend.