For the second time, Massachusetts General Hospital has transplanted a genetically edited pig kidney into a human.

A team at Massachusetts General Hospital led by Harvard Medical School physician-scientists has for the second time successfully transplanted a genetically edited pig kidney into a living person. The team performed the first surgery of its kind in the world in March 2024.

Two US biotech companies say the Food and Drug Administration has cleared them to conduct clinical trials of their gene-edited pig kidneys for human transplants.

A New Hampshire man fought for the chance at a pig kidney transplant, spending months getting into good enough shape to be part of a small pilot study of a highly experimental treatment. His effort paid off: Tim Andrews,

The recipient was Tim Andrews, a 66-year-old New Hampshire resident who had end-stage kidney disease and was on dialysis for more than two years.

Tim Andrews, 66, was diagnosed with end-stage kidney disease more than two years ago. Since then, he's treated his condition with dialysis, leaving him constantly fatigued and unable to keep up with the pace of regular activities.

With the procedure, Tim Andrews, 66, of Concord, New Hampshire, became the fourth person in the world to receive a genetically-edited pig kidney He was discharged from the hospital on Feb. 1, with his new kidney functioning as expected.