Nonliving donation
In most cases, the new liver will come from an organ donor who has just died. This is called a nonliving donation. Before the transplant is done, a donated liver is screened for liver diseases, such as viral hepatitis. It's also checked to make sure it's a match with your blood type.
Living donation
Sometimes a healthy living person will donate part of their liver. This is called a living donation. This is often a family member who matches your blood type. Or it may be someone who isn't related to you but whose blood type is a good match.
The liver is the only organ in the body that can replace lost or injured tissue (regenerate). So the part of the liver removed from the living donor grows back after the transplant. And the transplanted liver that you receive also grows to full size after the transplant.
A living donation transplant can be scheduled ahead of time. It may be able to be done sooner than if you go on the waiting list for a nonliving donor. Living donor transplants are less common than nonliving donor transplants. But they are now often done all over the United States.