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.

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.

Doctors at Massachusetts General Hospital transplanted a pig kidney into a 66-year-old patient with end-stage kidney disease. The surgical team reported that the new kidney is functioning as expected.

Massachusetts General Hospital have successfully completed its second xenotransplant of a genetically-edited pig kidney into a human. 66-year-old Tim Andrews from New Hampshire became the fourth person globally to receive a genetically-edited pig kidney.

A Mass General Hospital surgical team has completed its second pig-to-human kidney transplant, less than a year after the hospital performed the world’s first such surgery.