First human bladder transplant patient thrives one year post-surgery

Patient had been on dialysis and without a functioning bladder for seven years, severely limiting quality of life and mobility until the transplant restored normal function.

For seven years, Oscar Larrainzar lived without a functioning bladder, tethered to dialysis and the slow diminishment that chronic illness imposes on a life. In May 2025, at UCLA Health, surgeon Dr. Nima Nassiri performed what medicine had long considered impossible — a human bladder transplant — and one year later, Larrainzar swims with his daughter and calls his life normal again. The achievement belongs not only to one patient but to the long arc of surgical imagination: Nassiri has since completed additional transplants, and a clinical trial is underway, opening a door that end-stage bladd

First human bladder transplant patient thrives one year post-surgery

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