Pittsburgh, PA, February 10, 2010–Lisa Mazza broke into tears when doctors wheeled her from her ailing sister.

But it wasn’t until she entered the operating room that her unease turned to terror.

“You see all these instruments and tools, clamps and everything, all sanitized and lined up on that blue sheet,” she said. “There were so many of them. And the breathing instruments, and all the different people in there. … It was very intimidating. It was dawning on me at that moment that I was getting ready to actually do this.”

UPMC Montefiore surgeons were about to open her abdomen, slice off 50 percent to 60 percent of her liver and transplant it into her sister, Christina, who six months before learned she has hereditary amyloidosis.