Exploring the Vanguard of Transplantation: Hand, Face and Urogenital
February 8, 2016
In a span of just five years, the department has protocols approved and in place for hand, face and penile transplants—an indication of just how quickly its transplant portfolio has grown, and how the entire field has evolved.
“Transplant is now accepted as a bona fide tool to restore both form and function in patients with devastating damage and tissue loss,” says Gerald Brandacher, scientific director of the reconstructive transplantation program.
Two patients in particular illustrate the dramatic effect reconstructive transplantation can have. Brendan Marrocco, severely injured in a 2009 roadside bomb attack in Iraq, was the first American soldier to survive losing all four limbs on the battlefield. In 2012, department surgeons led one of the nation’s most extensive and complicated bilateral arm transplants to give Marrocco two new arms. Today, he drives a truck, performs all activities of daily living and is preparing to move into his own home.
“That represents independence, freedom and quality of life,” says Jaimie Shores, clinical director of the arm/hand transplant program. “He’s given us great hope for what people are capable of accomplishing after these transplants.”
Marrocco’s progress laid the foundation for the department to complete another above-elbow transplant in June 2015. The patient was a man who’d fallen from a hotel balcony; during the fall, his arm tore off near the shoulder. The team expects substantial return of elbow strength and motion and meaningful return of hand function, Shores says.
Along with the painstaking skills and techniques required to prepare tissue, bone, muscle, blood vessels and nerves to support a transplant, what has allowed the program to move forward so dramatically is the minimal immunosuppression protocol its faculty members have been developing over the last two decades. Shifting between Brandacher’s lab and the clinic for innovations and adjustments, the protocol uses donor bone marrow to shrink the typical three-medication immunosuppressive protocol down to just one drug. Ongoing preclinical large animal models suggest it may be possible to remove the remaining medication after one month of treatment, eliminating the need for a lifelong regimen altogether.
“We’ve been pioneers in the field in regard to decreasing the burden of immunosuppression in patients getting transplants. We’re making excellent progress with the protocol,” Shores says.
Besides representing a significant leap for the field, the protocol also has the potential to increase the pool of candidates for hand transplantation. And there is no reason, once fully proven, that it can’t translate to solid organ transplant, opening up brand-new possibilities for kidney, heart and liver patients.
Since the world’s first face transplant in 2005, only nine have been completed in the U.S. and 35 worldwide. Given the complexity of the procedure, facial transplantation has been limited to patients with severe facial deformities. Following the success of the arm/hand transplant program, a multidisciplinary team at Johns Hopkins, including plastic and reconstructive surgeons, ENT surgeons, oculoplastic surgeons, and critical care and anesthesiologists, has been preparing for face transplants.
“A critical aspect of our facial transplant program is the collaborative effort of these different specialties coming together, providing their expertise, and forming the very best that Johns Hopkins Medicine offers for our potential recipients,” says Amir Dorafshar, clinical co-director of the Face Transplant Program.
The multidisciplinary team has identified a potential recipient and recently trained surgeons from various backgrounds to work cohesively in a synchronized fashion to perform one of the largest transplants to date, Dorafshar says. Working in close collaboration with the Johns Hopkins Applied Physics Laboratory and Walter Reed National Military Medical Center, the team will use the latest technology—customized cutting templates with threedimensional tracking, along with real-time cephalometry—to guide surgeons as they cut and attach face-jaw-teeth segments to ensure optimal positioning and functionality of the transplant, says Chad Gordon, clinical co-director of the Face Transplant Program and Multidisciplinary Adult Cranioplasty Center. This patent-pending technology is designed to minimize the follow-up revision surgeries common in the past, when surgeons had no way of knowing which microscopic bone cuts, measurements and angles would maximize functionality until the surgery was complete.
“It’s like GPS for face transplant,” Gordon says. “If you get into a traffic jam based on unexpected findings and need a detour to get someplace better, quicker and safer, you simply hit adjust. That’s what we have now. You just click to see if you’re doing the right job, or if you need to adjust the plan on the fly.”
The team is looking forward to putting its preparation into action. “Our teams are trained and ready,” Dorafshar says. “We have put into place the necessary infrastructure and team-oriented framework for many other face transplants to come. Using the unique immune modulation protocol with minimal immunosuppression, the team is ready to broaden the pool of candidates who could benefit not only from face transplant, but also eyelid, nose or lip transplants.”
Following the success of their upper extremity reconstructive transplants, faculty members began planning to transplant a penis—something that has been attempted only twice in the world. In particular, they were hoping to benefit soldiers injured by roadside bombs, who sometimes experience damage in pelvic areas not covered by traditional body armor, and who often sustain such extensive additional injuries that surgeons are hard-pressed to find the donor sites necessary for conventional penile reconstruction.
But the literature indicated that after a penis is sewn back on following a traumatic cut, the penis generally survives, but the skin dies. Enter resident physician Sami Tuffaha, whose untold hours studying the problem in the lab were rewarded by the discovery of a previously unknown blood vessel leading from the femoral artery to supply the shaft skin. “When there’s so much tissue, you need this vessel to make it work. No one knew this vessel even existed two and a half years ago,” says Richard Redett, director of the Pediatric Plastic and Reconstructive Surgery and Johns Hopkins Cleft Lip and Palate Center.
Armed with this new finding, Redett’s 15 years of experience doing complex urogenital reconstructions on children, the promise of minimal immunosuppression and perhaps the most experienced reconstructive transplant program in the country, faculty members have been practicing all the details of the procedure. With the collaboration of specialties, including urology, psychiatry and psychology, bioethics, and transplant immunology, the team hopes to complete the first penile transplant in the near future.
“You can only imagine the impact a penile amputation would have on a young man in his early 20s, who’s been serving overseas and returns from service to the civilian world and all prospects of a normal social and sexual life have been taken away from him,” says reconstructive surgeon Damon Cooney. “We want to do whatever we can to help him return to manhood and wholeness, and also urinary and sexual function.”