Expanding Living Donor Liver Transplantation
In the 1980s in the United States (US), young children in liver failure were at proportionately greater risk of dying on the deceased donor liver transplant (DDLT) waitlist than adults because of the lack of appropriately sized grafts. This led to the development of two deceased donor liver techniques—reduced-size (trimming the graft to decrease its size) and split-liver (where one liver could provide grafts to two candidates). These developments decreased but did not eliminate waitlist mortality for young children. Split-liver DDLT paved the way for living donor liver transplantation (LDLT) in children using the lateral segments of the left lobe. Pediatric LDLT began slowly at only a few centers with successful donor and recipient results. Adult-to-adult LDLT expanded quickly despite many US programs having limited experience, low volumes, and significant donor morbidity. The ethical issues raised by the rapid expansion of adult-to-adult LDLT in the US are discussed.