I don't see how the kid's autism should play a part in the decision at all. If it's murder to withhold cancer treatment from a child, then it's still murder if the child also has another issue going on. I do think the remission rate and prognosis of the cancer should play a part in the decision though. If there is little to no hope of remission, then I do think it's a parent-doctor decision (and child, if the child is old enough and able to express an opinion), but it's just horrible that they're making it out as ok just because he was non-verbal and difficult to manage.
no subject