That’s not the only milestone the Mass General team is marking: A pig kidney has kept another New Hampshire man, Tim Andrews, off dialysis for a record seven months and counting. Until now, the longest that a gene-edited pig organ transplant was known to last was 130 days.

Stewart’s case marks another step forward for the Mass General team, which is also following the progress of Tim Andrews, a New Hampshire man who has now lived seven months with a transplanted pig kidney — the longest known survival time for a gene-edited pig organ to date.