Transplants save lives—but supply meets only a fraction of need
Moving an organ or tissue from one body to another can replace failed function. Kidneys are the most transplanted organs worldwide; corneas and musculoskeletal grafts outnumber organs more than tenfold. Global supply still covers only about 10–20% of need.
Transplantation relocates organs, tissues, or cells into a recipient—sometimes the same person (autograft), usually another human (allograft), rarely another species (xenograft). Successfully transplanted organs include heart, kidneys, liver, lungs, pancreas, intestine, thymus, and uterus. Living or deceased donors (brain death or circulatory death) can give organs; most tissues except corneas can be banked up to five years if recovered within twenty-four hours of cardiac arrest. U.S. cumulative transplants reached one million by 9 September 2022. Rejection is the central medical threat; serotyping and immunosuppressants reduce it. Identical-twin isografts avoid immune attack; pig heart valves are common successful xenografts, while broader xenotransplantation still carries rejection and infection risks.
Creative logistics stretch scarce grafts. People with cystic fibrosis who receive heart–lung blocks can donate their still-healthy heart onward—a 2016 Stanford case linked two patients and three teams. Domino kidney chains let unmatched living donors unlock multiple transplants; a 2012 chain involved 60 people and 30 kidneys, surpassed in 2015 by 70 surgeries and 35 transplants across 25 centers. In May 2023 New York Presbyterian performed the first baby domino heart transplant, saving two infants. Very young children under about twelve to twenty-four months can sometimes receive ABO-incompatible organs because their immune systems have not yet made strong blood-group antibodies; UNOS allows ABOi heart transplants under age two when titers are 1:4 or lower.
J. Hartwell Harrison removed the kidney for the first successful kidney transplant in 1954. Machine perfusion and normothermic ex-vivo systems now extend preservation and let teams assess grafts before implant. Ethics pile up around defining death, consent, payment, transplant tourism, trafficking, and false hope. Failed allografts create rare nightmares—one published case describes complete liquefaction of a transplanted kidney in a 52-year-old woman—reminding clinicians that transplant medicine remains among the most complex corners of care.
Source: Transplantation (medicine)
