The California surgeon underwent the first successful bladder transplant, a patient who had previously suffered from a bladder and was removed due to cancer treatment and end-stage renal disease.

This treatment puts the patient as the father of four Oscar Larrainzar, 41, despite considerable short- and long-term risks and unknowns for the surgery.

The bladder transplant was conducted by two surgeons who worked for many years to develop the technology, which was used to transplant a kidney and bladder recovered from a human donor.

"This surgery is a historic moment in medicine and it affects how we manage carefully selected 'terminal' blary blbone patients with highly symptomatic 'terminal' blbone."

“Transplantation is a life-saving and life-enhancing treatment option for many conditions that affect major organs, and bladder can now be added to the list.”

Gill had surgery with Dr. Nima Nassiri of the UCLA Emergency Institute.

"It's been over four years since the first attempt to have a bladder transplant," Nasiri said in a statement. "For patients with appropriate choices, it's exciting to be able to offer new potential options."

Patients who remove the bladder will usually relocate part of the intestine in the urine, which often leads to many new complications, including infection and digestive problems. These complications have led doctors around the world to seek bladder transplant technology for years.

The transplants performed in early May have been successful so far, and doctors say they are “satisfied” with Lalanzar’s recovery, although there are still many unknowns. For example, how Larrainzar's new bladder will work over time and how long it will take for him to perform immunosuppressive drugs to prevent rejection of the organs.

Doctors plan to perform more bladder transplants as part of UCLA Health clinical trials with the goal of better understanding of potential complications and helping patients suffering from debilitating bladder conditions.