Adult-to-adult living donor liver transplantation (ALDLT) is a reality, sho
rtly after its introduction into clinical practice, it is being performed i
n approximately 50 centers throughout the United States and Europe. The qui
ck development of ALDLT and some deaths among donors repropose old ethical
dilemmas and confront the transplant community with new urgent problems. To
minimize risks for recipients and, especially, donors, two key questions a
re addressed: (1) who can or should perform the procedure, and (2) what pat
ient should undergo the procedure. The high risks taken by live donors unde
rgoing a hemihepatectomy seem to be justified by the steadily increasing mo
rtality of adult recipients waiting for transplantation. A comprehensive co
nsent procedure is at the base of responsible decision making for both dono
rs and recipients. In adherence to basic medical criteria, the autonomy of
decision of donors and recipients, may allow the extension of indications t
o patients not suitable to undergo transplantation with cadaveric grafts. T
he broadening of indications is appropriate only in centers with adequate e
xperience and proven expertise in ALDLT. The medical community faces the du
ty of regulating ALDLT before external influences force undesired policy ch
anges, particularly if not based on medical grounds. Individual centers and
patients are ultimately responsible for the correct use of LDLT.