[ A craniotomy? They removed his brain? But he had so little to spare... ]
This is the procedure where they use a can opener to remove the very top of the skull and scoop out the offending mass with an ice cream scoop, I hear they are flying in the scoop from a baskin robbins in Hawaii where Obama once worked because it is the only medical related device from the Obama era that actually works.
In McCains case they won’t need a big ice cream scoop - maybe one of the little melon ballers.