"...and even with therapy, the condition would progress into stage three within ten years. The only permanently effective treatment is transplantation."

"Oh. It must be dangerous to replace brain parts..."

"No, the risk is quite low, and it wouldn't be part of your brain, but the complete brain."

"Sorry, what?"

"Basically, we would amputate at the lower part of the neck, then implant a healthy head. We've just stored one that should be compatible; if testing confirms that, we can perform the procedure tomorrow."

"But... What happens to me?"

"It's a question of perspective. You'll have a different one afterwards."