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Gene-Edited Pig Kidney Transplant Declared a 'Miracle' After 271 Days

10/29/2025

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Summary

Story summary

Tim Andrews, a 67-year-old from Concord, New Hampshire, had a gene-edited pig kidney removed after 271 days in a Mass General Brigham xenotransplant pilot.
The program aims to address the organ shortage, with more than 100,000 on the U.S. transplant list.
Andrews described the transplant as a "miracle" that helped him regain energy and enjoy life.
Mass General Brigham plans further pig-to-human transplant procedures later this year.

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Story summary

Tim Andrews, a 67-year-old from Concord, New Hampshire, had a gene-edited pig kidney removed after 271 days in a Mass General Brigham xenotransplant pilot.
The program aims to address the organ shortage, with more than 100,000 on the U.S. transplant list.
Andrews described the transplant as a "miracle" that helped him regain energy and enjoy life.
Mass General Brigham plans further pig-to-human transplant procedures later this year.