Having bone cancer myself, I think it makes sense that the song is about a friend/family member of him dying of it. Not every patient with bone cancer will die, but it is certainly possible. Elsewhere on the album he talks about femur (upper bone of a leg towards the knee), a common place for bone cancer. The "tubes in your arm" could be about the chemo or a sedative that is given to him.
Having bone cancer myself, I think it makes sense that the song is about a friend/family member of him dying of it. Not every patient with bone cancer will die, but it is certainly possible. Elsewhere on the album he talks about femur (upper bone of a leg towards the knee), a common place for bone cancer. The "tubes in your arm" could be about the chemo or a sedative that is given to him.