I know with the Iranian twins who died (adult conjoined sisters), they were advised that it was a super risky procedure but wanted to go through with it anyway.

I know with the Iranian twins who died (adult conjoined sisters), they were advised that it was a super risky procedure but wanted to go through with it anyway. Some of the other twins he's operated on had mixed results (i.e., one twin thrived but the other didn't, or both only lived a few years after being separated), but I think at least a few pairs have done pretty well. My understanding is that separating craniopagus twins has a pretty high risk of complication/failure, even when you know what you're doing. I also know for a fact that Carson's pioneered hemispherectomy as treatment for severe childhood seizures, and some of those kids are now happy and healthy adults: https://www.cbsnews.com/baltimore/news/jessie-hall-medical-miracle-half-brain-removed-johns-hopkins/ https://www.cbsnews.com/baltimore/news/jessie-hall-medical-m... Don't get me wrong, I don't like the guy as a politician. But he knows his way around a brain.