So, a 13 year old does not have the right to self-determination. The parents must act in his interest. They are in a tough spot. The kid is vowing to kick and punch anyone who comes near him with a needle, so what can one really do?
He's a minor, so he doesn't have the experience to understand all the implications. Yet it IS chemo, which is poison. I would not want to be in any of their shoes.
I have been reading, and the family is treating him with a "special diet" which they believe is shrinking the tumor (it isn't). So they believe it's wrong to administer poison to the body. But it's a tricky situation. I wouldn't want anybody telling me I HAD to take Chemo.
But that's just me, and I am an adult.