Tim Andrews Gets Human Kidney After 271 Days With Pig Organ
Massachusetts, US

BRIAN SNYDER/Reuters
What Happened
What Happened
Where Sources Agree
- arrows_inputRecord-Setting Transplant Bridge: Coverage documents confirm that a genetically modified pig kidney functioned for 271 days as a temporary bridge, representing the first successful transition from a pig kidney to a human transplant, according to a study published in The Lancet.
- arrows_inputGenomic Modification and Outcome: Sources uniformly report researchers utilized Yucatan miniature pigs with 69 genomic modifications to humanize the organs; the transplant eventually failed due to thrombotic microangiopathy, according to eGenesis and Lancet findings.
- arrows_inputOrgan Shortage Crisis: Coverage broadly notes that the organ shortage represents a critical transplantation crisis, with more than 95,000 people in the United States currently awaiting a kidney while only approximately 25,000 transplants occur annually, according to official transplantation data.
Where Sources Disagree
- arrows_outputPatient Gender Identification: While some reports describe the pig kidney transplant recipient as a woman, the majority of sources consistently identify the patient as a 66-year-old man named Tim Andrews.
- arrows_outputPig Kidney Recipient Count: Reports differ on the number of prior pig kidney recipients: some sources identify Tim Andrews as the fourth recipient, while others state that five patients have received the transplant.
Timeline
September 03, 2026
Lancet report and follow-up: The team published a detailed case report in The Lancet (Sept 3, 2026) summarising the xenograft course, immunologic findings and that, following allotransplantation, the patient showed immediate and sustained human graft function with no sensitisation during 231 days of follow-up. The paper highlighted both the promise and remaining challenges of kidney xenotransplantation.
January 13, 2026
Explant and human transplant: The porcine kidney was removed after 271 days, the patient returned to dialysis briefly, and 82 days later underwent a deceased-donor human kidney transplant with immediate graft function. Clinicians reported no evidence of sensitisation during follow-up.
October 23, 2025
Dialysis-free for 271 days: The transplanted pig kidney worked immediately and allowed the patient to live without dialysis for 271 days, marking the longest recorded survival with a porcine kidney in a living human. The organ provided sustained dialysis-free support while the patient awaited a human donor.
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Timeline
September 03, 2026
Lancet report and follow-up: The team published a detailed case report in The Lancet (Sept 3, 2026) summarising the xenograft course, immunologic findings and that, following allotransplantation, the patient showed immediate and sustained human graft function with no sensitisation during 231 days of follow-up. The paper highlighted both the promise and remaining challenges of kidney xenotransplantation.
January 13, 2026
Explant and human transplant: The porcine kidney was removed after 271 days, the patient returned to dialysis briefly, and 82 days later underwent a deceased-donor human kidney transplant with immediate graft function. Clinicians reported no evidence of sensitisation during follow-up.
October 23, 2025
Dialysis-free for 271 days: The transplanted pig kidney worked immediately and allowed the patient to live without dialysis for 271 days, marking the longest recorded survival with a porcine kidney in a living human. The organ provided sustained dialysis-free support while the patient awaited a human donor.













