Surgeons in southern California successfully completed the world's first-ever human bladder transplant on 41-year-old Oscar Larrainzar in what's being called a potentially "game-changing" method

Multiple obstacles, including vascular connections and immune suppression, made the pioneering bladder transplant procedure a challenge.

Surgeons in Southern California have performed the first human bladder transplant, introducing a new, potentially life-changing procedure for people with debilitating bladder conditions.