"For any surgery there's a risk of bleeding," said Koffron. "For organ transplant there has to be vessels that need to be reconnected."
Even post-surgery, donors may get an infection or a blood clot, said Koffron, adding that these complications are extremely rare.
"You can't predict who this can happen to," he said.
Rare cases should not dissuade people who are considering being a live donor, Koffron said.
"It is a catastrophe, but if you think of all the successful donations and having people have a better life because of their donation, you have to weigh the options," said Koffron.