What if you bleed to death on the table?
What if you go into cardiac arrest?
What if you are infected by some virus during surgery, and you are diagnosed 5 months later, when it's to late?
What if the doctor dies in the middle of the operation, and bleeds all over your open body, then you die from AIDS? (That he potentially could have.)
What if they accidentally leave a scalpel in your body?
What if?