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Vascularized Composite Allotransplantation: Alternatives and Catch-22s.

Technical success has been achieved in several forms of vascularized composite allotransplantation, including hand, face, penis, and lower extremity. However, the risks of lifelong immunosuppression have limited these procedures to a select group of patients for whom nontransplant alternatives have resulted in unsatisfactory outcomes. Recent reports of facial allograft failure, and subsequent reconstruction using autologous tissues, have reinforced the idea that a surgical contingency plan must be in place in case this devastating complication occurs. Interestingly, backup plans in the setting of vascularized composite allotransplantation consist of the nontransplant alternatives that were deemed suboptimal in the first place. Moreover, these options may have been exhausted before transplantation, and may therefore be limited in the case of allograft loss or reamputation. In this article, the authors describe the surgical and nonsurgical alternatives to hand, face, penis, and lower extremity transplantation. In addition, the authors explore the ethical implications of approaching vascularized composite allotransplantation as a "last resort" or as a "high-risk, improved-outcome" procedure, focusing on whether nontransplant options eventually preclude vascularized composite allotransplantation, or whether vascularized composite allotransplantation limits future nontransplant reconstruction.

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