Re: stage iv lung cancer what to expect at the end
I'm so sorry to hear about your brother.
When my Mom was first diagnosed Stage IV, she was told that without treatment she'd have 3 weeks to live. She did the treatment and was given 3 months. The doctor gave her the 3 months a couple times. The last time she went in, she asked him what the timeline was. He'd told her he wanted to say 3 months, but she keeps proving him wrong, so instead he told her that it's in the future. She managed to survive 10 months after her initial symptoms started.
Each person is different, but I would definitely talk to your brother and do what tiggertoo has suggested about the pain management and living will. My Mom did the living will, and she also had two of us for the pain management. It made it a lot easier for her once she was at the final stages, and it made it a lot easier for myself and a close friend of hers as well.