The transplant lasted 271 days, the longest dialysis-free survival after a pig kidney transplant in a living human, as well as the first transition from pig-to-human kidney transplantation.

A man with end-stage kidney failure was kept off dialysis for nine months after being given a genetically modified organ from a pig.

The world-first procedure was carried out by the US-based Mass General Brigham academic centres and hospitals, which said the transplant was intended to be temporary before a permanent human donor could be found.

It marks the longest dialysis-free survival after a pig kidney transplant in a living human, as well as the first transition from pig-to-human kidney transplantation.