domino organ transplant
n.— «Clinton House and John Couch—medical history’s first “domino” organ transplant patients—met Thursday for the first time at Johns Hopkins Hospital in Baltimore.…House…received a heart and lungs from a brain-dead car accident victim. House’s lungs had been ruined by the genetic disease, but his heart was healthy enough to transplant into Couch.» —“Transplant duo meet” USA Today May 22, 1987. (source: Double-Tongued Dictionary)