This is a hard question. I know an obvious answer for what I'd do if it hits me. Answering for a child... hard.
Easier to answer is what I would NOT do:
Consult quacks
Pin my hopes on mythological nonsense
What I would do:
See what conventional medicine can do in this situation
Accept the truth if medicine can't cure it
In the village I used to live (*sigh*) is a doctor who lost a daughter to leukemia. Despite all his knowledge, connections to specialists and his money the child died at one digit age.
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Well, like, if your son was dying of cancer...youre telling me there'd be something you *wouldnt* do? seriously? i would do everything, absolutely everything, in the entire world.
does what they said involve doing that? hate when people make these arguments, not even on topic. you know exactly what i meant. The moon isnt falling towards the earth and if there was you cant do anything about it anyway AND its not your son
My more rational way of approaching this has a reason: the well-being of the child. A loving parent might want to try "anything" to help, but my fear is that this "anything" might hurt the child. Trying unproven therapies(?) could not only be useless but cause severe suffering. The approaches I dismissed in blunt words usually don't help beyond a possible placebo effect
Dangerous half-knowledge or even complete nonsense are all too common in discussions about cancer. A certain degree of caution is needed
First priority is minimizing suffering while maximizing chances of recovery. Conventional medicine has the best track record in this regard. Still, the terms "terminal illness" and "point of no return" exist for a reason. Reality doesn't care for our emotions and wishes