World's First Bladder Transplant Offers New Hope for Millions With Organ Failure

Patient Oscar Larrainzar had both kidneys and most of his bladder removed due to cancer, requiring seven years of dialysis before receiving the transplant.

On May 4th, 2025, in a Los Angeles operating room, surgeons crossed a threshold that medicine had long considered unreachable — successfully transplanting a human bladder for the first time in history. A 41-year-old man named Oscar Larrainzar, who had spent seven years unable to urinate normally after cancer stripped him of his kidneys and most of his bladder, walked away from the procedure with restored function and no need for dialysis. The achievement matters not only for what it gave one man, but for what it may eventually offer the millions worldwide for whom bladder failure has meant a l

World's First Bladder Transplant Offers New Hope for Millions With Organ Failure

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