Massachusetts General Hospital has performed its second successful genetically edited pig kidney transplant into a patient, MGH reported on Friday. The “miracle” transplant is giving 66-year-old Tim Andrews “a new lease on life,” he said as he’s now recovering and off dialysis for the first time in more than two years.

It was the fourth pig kidney transplant in the United States, and the first of three that will be done at Mass General as part of a new clinical trial sanctioned by the Food and Drug Administration. Two of the previous patients died shortly after the procedure, including one who was critically ill before the transplant.

The second person ever has received a transplant with a genetically modified pig kidney. Tim Andrews, a 66-year-old who lives in Concord, N.H., has end-stage kidney disease and had been on dialysis for more than two years to compensate for his failing kidney function.

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.