A successful liver transplant can be life-saving for patients facing liver failure and there are thousands of people currently waiting to receive transplants. Since the liver is the only organ that can regenerate itself and grow from a small piece back to its full size, a living donor can volunteer to divide their healthy liver and give one piece to someone else in need. After the transplant, both pieces of the donor liver will grow back to full size in six to eight weeks.
The story linked to below describes the experiences of Terra Goudge, a fibrolamellar patient, with a life-saving living-donor liver transplant she received at the University of Pittsburgh Medical Center:
Doctors explore lifting barriers to living organ donation | AP News