Record-Breaking Xenotransplant: Pig Organ Survives 9 Months

Person holding digital kidney illustration in hand

A groundbreaking medical success story raises hopes and ethical questions: a pig kidney survives in a human for nine months.

Story Highlights

Tim Andrews, 67, received a genetically modified pig kidney.
The kidney functioned for nine months, a record for xenotransplantation.
Advanced genetic modifications reduced rejection risks.
Complications necessitated the organ’s removal, prompting further analysis.

Tim Andrews’ Remarkable Medical Journey

In January 2025, Tim Andrews became the first individual to live with a pig kidney for nine months. This groundbreaking procedure was performed in the United States, where organ shortages have long been a critical issue. Andrews, a 67-year-old man with end-stage kidney disease, received the kidney under compassionate use, not as part of a formal clinical trial. The nine-month survival marks a record in xenotransplantation, surpassing previous attempts where organs failed within weeks or months.

#HEALTH #MEDICINE
Pig Kidney Removed From Transplant Patient After Nine Months

Tim Andrews, 67, lived with a genetically modified organ longer than any other recipient… https://t.co/26hOWEx8UT pic.twitter.com/dNSd41m7Fe

— DomPachino101 (@DomPachino101) October 29, 2025

The kidney was sourced from eGenesis, a biotechnology company specializing in xenotransplantation. The organ underwent extensive genetic modifications to minimize rejection and enhance compatibility with the human immune system. These modifications included the removal of specific antigens and the addition of human genes, which played a pivotal role in the kidney’s prolonged functionality.

Challenges and Complications

While the nine-month period without dialysis was unprecedented, the journey was not without complications. In October 2025, the pig kidney was removed after emerging complications prompted medical intervention. The specifics of these complications are under review, but the case has provided valuable data for the advancement of xenotransplantation.

Despite the organ’s eventual removal, medical experts have hailed the case as a landmark achievement, offering insights that could pave the way for future procedures. The extended survival time challenges previous assumptions about the limitations of xenotransplantation and highlights the potential for genetically modified organs to address the dire organ shortage crisis.

Ethical and Future Implications

The success of this procedure has sparked a renewed debate over the ethical implications of animal-to-human transplants. While the potential to alleviate organ shortages is substantial, concerns remain about the long-term viability of such transplants and the ethical treatment of genetically modified animals. Regulatory frameworks may need to adapt to these emerging technologies as they become more prevalent in the medical field.

Looking ahead, the data from Tim Andrews’ case is expected to inform future clinical trials, with the ultimate goal of making xenotransplantation a viable and routine option for patients in need. As the biotechnology industry continues to innovate, the potential to save lives through these procedures grows, offering hope to countless individuals on organ transplant waiting lists.