A liver transplant is a surgery in which doctors remove a person's sick liver and replace it with a healthy donor liver.
Transplants are done when a child's liver does not work well and they won't survive without a new one. Doctors sometimes call this liver failure. Doctors only recommend a liver transplant after they have tried all other treatments to save the child's liver.
Most organ donors are adults and children who have agreed (or their guardians have agreed) to donate their organs after they die.