Face transplantation entails partial or full replacement of a patient's face with a donor's face. The patient's face is removed and replaced, including the underlying fat, nerves and blood vessels, but no musculature. Thus, face transplantation does not give the patient's face the appearance of the deceased donor's face because the underlying musculature and bones are different. Individuals with faces disfigured by burns, cancer extirpation, trauma, or congenital birth defects might benefit from the procedure, which consists of a series of operations with issues of age, sex, skin color, and tissue type. In some cases, face transplantation may improve patients' basic functions (e.g., breathing, eating, speaking, and swallowing). The surgery may take 8 to 24 hours, followed by a 10 to 14 days hospital stay. Following the transplantation, a lifetime regimen of immunosuppressants is needed to prevent rejection. Long-term immunosuppression increases the risk of the development of life-threatening infections, kidney damage, and cancer. The surgery may result in complications such as infections that would require a second transplant or reconstruction with skin grafts. Psychological effects of the procedure may include disappointment, remorse, or grief/guilt toward the donor.
Dubernard and colleagues (2007) performed the first human partial face allograft on November 27, 2005 and reported outcomes up to 18 months after transplantation. The post-surgical induction immunosuppression protocol included thymoglobulins combined with mycophenolate mofetil, prednisone, and tacrolimus. Donor hematopoietic stem cells were infused on post-operative days 4 and 11. Sequential biopsy specimens were taken from a sentinel skin graft, the facial skin, and the oral mucosa. Functional progress was assessed by tests of sensory and motor function performed monthly. Psychological support was provided before and after transplantation. Sensitivity to light touch, as assessed with the use of static monofilaments, as well as sensitivity to heat and cold had returned to normal at 6 months after transplantation. Motor recovery was slower, and labial contact allowing complete mouth closure was achieved at 10 months. Psychological acceptance of the graft progressed as function improved. Rejection episodes occurred on days 18 and 214 after transplantation and were reversed. A decrease in inulin clearance led to a change in immunosuppressive regimen from tacrolimus to sirolimus at 14 months. Extracorporeal photochemotherapy (ECP) was introduced at 10 months to prevent recurrence of rejection. There have been no subsequent rejection episodes. At 18 months, the patient was satisfied with the esthetic result. The authors concluded that in this patient who underwent the first partial face transplantation, the functional and esthetic results 18 months after transplantation were satisfactory.
Lantieri and associates (2008) reported a 1-year follow-up of a patient who underwent face transplantation with a composite tissue allograft (CTA). On January 21, 2007, a 29-year old man with neurofibromatosis type 1 underwent resection of a massive plexiform neurofibroma that infiltrated diffusely the middle and lower part of his face. The main goal was to restore both the cutaneous appearance and functions of the face, including, in particular, control of orbicularis oculi and oris muscle contraction. The issues of immunosuppressive therapy, psychological outcome, and social re-integration were addressed, together with the monitoring of graft rejection by biopsies of the skin and mucosa. The initial post-operative course was uncomplicated; 2 episodes of clinical rejection occurred on days 28 and 64. The second episode was associated with cytomegalovirus (CMV) infection. Both episodes resolved favorably, with no further clinical signs of rejection, making the reduction of immunosuppressive treatment possible. A year after surgery, the functional outcome was very good, with successful sensory and motor re-innervation in the transplanted territory. Psychological recovery was excellent, with complete social re-integration. The authors concluded that this case demonstrated the feasibility of surgically removing a large part of the face and replacing it with a CTA. This facial repair procedure, which seems to have a satisfactory risk-to-benefit ratio, could be offered in rare and selected cases.
Guo and associates (2008) performed a partial facial transplant in 2006, and reported the 2-year follow-up of the patient. The patient was mauled by a bear in October 2004. Allograft composite tissue transplantation was done in April 2006 after careful systemic preparation. The surgery included anastomosis of the right mandibular artery and anterior facial vein, whole repair of total nose, upper lip, parotid gland, front wall of the maxillary sinus, part of the infra-orbital wall, and zygomatic bone. Facial nerve anastomosis was done during the operation. Quadruple immunomodulatory therapy was used, including corticosteroids, mycophenolate mofetil, tacrolimus, and humanized IL-2 receptor monoclonal antibody. Follow-up included T lymphocyte subgroups in peripheral blood, pathological and immunohistochemical examinations, functional progress, and psychological support. Composite tissue flap survived well. There were 3 acute rejection episodes at 3, 5, and 17 months post-transplantation, but these were controlled by adjustment of the tacrolimus dose or the use of methylprednisolone pulse therapy. Hepatic and renal functions were normal, and there was no infection. The patient developed hyperglycemia on day 3 after transplantation, which was controlled by medication. The authors concluded that facial transplantation could be successful in the short-term, but the procedure was not without complications. However, promising results could mean that this procedure might be an option for long-term restoration of severe facial disfigurement.
Siemionow and co-workers (2009) described an innovative approach entailing a single surgical procedure of face allograft transplantation that is a viable alternative of multiple reconstructive procedures. In December 2008, a 45-year old woman with severe mid-face trauma underwent near-total face transplantation in which 80 % of her face was replaced with a tailored CTA. After the operation, the patient did well physically and psychologically, and tolerated immunosuppression without any major complication. Routine biopsy on day 47 after transplantation showed rejection of graft mucosa; however, a single bolus of corticosteroids reversed rejection. During the first 3 weeks after transplantation, the patient accepted her new face; 6 months after surgery, the functional outcome has been excellent. In contrast to her status before transplantation, the patient can now breathe through her nose, smell, taste, speak intelligibly, eat solid foods, and drink from a cup. These researchers showed the feasibility of reconstruction of severely disfigured patients in a single surgical procedure using composite face allotransplantation. Thus, this approach should be taken in consideration as an early option for severely disfigured patients.
Siemionow and colleagues (2010) noted that a total of 9 face transplants have been performed since 2005. Multiple esthetic subunits (i.e., eyelids, lips, nose) with or without underlying cranio-facial skeletal defects (i.e., mandible, maxilla) have been successfully restored, thereby providing restoration of vital facial functions (e.g., smiling). As of today, face transplantation carries an estimated 2-year mortality of 20 %. Concomitant CTA, which involves a variable combination of allograft subtypes, has been performed in 2 of the 9 face transplant patients. These have included simultaneous bilateral hand transplants and tongue with mandible. The authors concluded that more studies are needed to examine the potential advantages and disadvantages of using this approach versus a staged approach for reconstruction.
Lantieri et al (2011) reported the reproducibility, difficulties, serious adverse events and outcomes of their patients who had undergone face transplantation. Five patients were included in a registered clinical research protocol after thorough screenings assessed by an independent expert committee that discussed systematically the alternative options. One patient suffered from plexiform neurofibromas, 2 from third-degree burns and 2 from gunshot injuries. They were included on a national waiting list with a dedicated face procurement procedure. Transplants were harvested from heart beating brain-dead donors before other tissues and organs. Induction immunosuppressive therapy included anti-thymocyte globulins, steroids, mycophenolate mofetil and tacrolimus. Maintenance therapy included steroids, mycophenolate mofetil, tacrolimus, and ECP. Four patients were transplanted with 7- to 38-month follow-up. One could not undergo facial transplantation due to multiple panel reactive antibodies after 18 months on the waiting list. Acute cellular rejections were controlled by conventional treatment. Opportunistic infections affected all patients and resulted in the death of a patient 2 months after the transplantation. Voluntary facial activity appeared at 3 to 5 months following transplant. The authors concluded that face transplantation has been reproducible under conventional immunosuppression. Major improvements in facial esthetic and function allowed patients to recover social relations and improved their quality of life.
Pomahac and colleagues (2011) reported the functional and anatomical restoration 1 year after face transplantation. A 59-year old man with severe disfigurement from electrical burn injury was treated with a facial allograft composed of bone and soft tissues to restore mid-facial form and function. An initial potent anti-rejection treatment was tapered to minimal dose of immunosuppression. There were no surgical complications. The patient showed facial redness during the initial post-operative months. One acute rejection episode was reversed with a brief methylprednisolone bolus treatment. Pathological analysis and the donor's medical history suggested that rosacea transferred from the donor caused the erythema, successfully treated with topical metronidazol. Significant restoration of nasal breathing, speech, feeding, sensation and animation was achieved. The patient was highly satisfied with the esthetic result, and regained much of his capacity for normal social life.
Petruzzo et al (2011) evaluated all allograft structures by histology, magnetic resonance imaging, ultrasonography and high resolution peripheral quantitative computed tomography scan in 4 bilateral hand-grafted patients (10, 7, 3 and 2 years of follow-up, respectively) and in 1 facial allotransplantation (5 years of follow-up). All the recipients presented normal skin structure without dermal fibrosis. Vessels were patent, without thrombosis, stenosis or intimal hyperplasia. Tendons and nerves were also normal; muscles showed some changes, such as a variable degree of muscular hypotrophy, particularly of intrinsic muscles, accompanied by fatty degeneration that might be related to denervation. In the majority of hand-grafted patients graft radius and recipient tibia showed a decrease in trabecular density, although in the graft radius the alterations also involved the cortices. No deterioration of graft function was noted. In these cases of CTA no signs of chronic graft rejection have been detected. However, the possibility that chronic rejection may develop in CTA exists, highlighting the necessity of close continuous follow-up of the patients.
Vasilic and Kon (2011) noted that CTA is a new development in reconstructive surgery that makes it possible to use identical tissue to repair large mutilating deformities (e.g., the face). Until now, a total of 13 face transplants have been performed worldwide. The functional and esthetic results are encouraging. However, the lifelong immunosuppressive therapy necessary to prevent rejection has considerable side effects.
Gordon et al (2011) stated that CTA is fraught with complexities similar to those of solid organ transplantation, including donor-related CMV transmission. With this in mind, the authors' objective was to (i) report their team's experience with infections and donor-related CMV transmission in relation to face transplantation, and (ii) review the facial CTA literature as it pertains to CMV and other various infections. A Medline literature search and article review was performed in July 2010 on all published articles specific to face transplantation, CMV disease, and all related infections and/or complications. In addition, the authors retrospectively reviewed their own institution's experience with face transplantation. Two of the world's first 4 face transplant recipients acquired CMV viral infection by means of their donated facial organs. Also, the French experience, and the authors' own, has been challenged by CMV re-activation and graft rejection, therefore necessitating a critical evaluation. These researchers have also learned from their own experience that facial CTA containing mucosa and para-nasal sinuses present a distinct challenge with regard to their accompanying flora. The authors concluded that although the risk of donor-derived CMV is acceptable in life-saving solid organ transplantation, for face transplantation patients, the scenario is different. When the authors' team performed the first nearly total face/maxilla transplantation (December 2008), there was little known regarding the consequences of CMV-related donor transmission in face transplantation. Therefore, the authors now recommend that all candidates be fully informed as to the risks of CMV/infectious transmission and that aggressive viral, bacterial, and fungal prophylaxis be instituted.
Morris et al (2007) noted that 3 years ago, the Working Party of the Royal College of Surgeons of England on Facial Transplantation concluded that until there was more information available about risks any potential patient would be exposed to, it would be unwise to proceed with transplantation of the human face. Over the last 3 years, there has been a deepening understanding of the potential psychological problems of facial transplantation as well as a very considerable debate on the ethical aspects of the procedure. Further data on experimental work in animal models of facial transplantation as well as medium-term follow-up data from 24 hand and forearm transplants in 18 patients has now become available. Furthermore, a partial facial transplantation has been performed in France and a second one in China. In this second edition of the report, the technical, immunological, psychological, and ethical issues were discussed again in light of this developing knowledge. In particular, there has been a major expansion of the sections on the psychological and societal issues, as well as the ethical and legal problems of facial transplantation. The report cited the many psychological issues that face transplant recipients must confront, including unrealistic expectations, the risk of devastating transplant failure, and the reactions of others to their altered appearance. Face transplantation also entails “invasive press interest and publicity”. While updated experience with hand transplants as well as the French face transplant recipient suggested that close monitoring and treatment adjustments can head off problems with acute rejection, the risks of chronic rejection remains unknown. The Working Party still has considerable reservations about facial transplantation. Although it accepts that on balance the risks can not be precisely quantified, they remain substantial. Thus, if patients are allowed to make an informed choice to proceed, they must be very carefully selected and protected in the process, along with the families of both the donors and the recipients. To achieve this, the Working Party insists that 15 minimum requirements must be fulfilled before it would be appropriate for a research ethics committee/institutional review board to approve of a proposal to undertake facial transplantation.
Chenggang and colleagues (2008) reviewed some issues associated with facial transplantation, especially focusing on the individual who underwent the transplant in the authors' department. These investigators discussed surgical indications, techniques, risks versus benefits, informed consent and psychosocial, societal and financial issues of facial transplantation. In their opinion, with the progresses in CTA, partial or full facial transplantation is becoming a timely and effective remedy for the significantly disfigured patients. However, there are a lot of unsolved problems, and as these researchers have performed the transplant on only 3 patients, no long-term outcome data are available. The authors stated that facial transplantation needs further research.
Mathes et al (2009) examined the current attitudes about the emerging field of CTA from those who treat complex facial injuries. In 2007, a Web-based blinded survey was sent to both burn and plastic surgeons involved in facial reconstruction. These researchers examined the practice profile with regard to complex facial injuries and asked respondents to assess the level of risk in CTA and indications for facial transplantation. Surgeons were asked to evaluate 3 clinical cases (2 closely mirroring clinical face transplantations) for suitability for treatment with CTA. A total of 164 surgeons responded (54 % response rate) and averaged 17.3 years in practice. They saw 12.1 severe facial-injury patients per year. A total of 78.7 % agreed that current techniques do not provide adequate reconstruction for severe facial injuries, and 26.2 % were in favor of performing CTA on immunosuppression. Acceptable indications for CTA were multiple failed reconstructions (70 %), total facial burn (59 %), and absence of remote tissue (55 %). Ten percent saw no acceptable indication for CTA. The scenarios that mimicked recent transplantations had moderate support in favor of CTA (20.7 % for the Chinese patient and 29.3 % for the French patient). The authors concluded that this survey demonstrated support for use of CTA to reconstruct complex facial deformities. Surgeons continue to be wary of immunosuppression and chronic rejection, and many want to wait for better immunologic treatment options.
Siemionow and Gordon (2010) stated that it must be emphasized that face transplantation is still experimental and its therapeutic value remains to be validated. All surgical teams pursuing this endeavor must dedicate an attention to detail and should accept a responsibility to publish their outcomes in a transparent manner in order to contribute to the international field. However, due to its inherent complexity, facial transplantation should only be performed by university-affiliated medical institutions capable of orchestrating a specialized multi-disciplinary team with a long-term commitment to its success.
Unlike other organ transplantations, much is unknown about the long-term side effects of face transplants. The known risks are similar to other organ transplantation procedures such as a need for lifelong immunosuppressive medications, diabetes, lymphoma, risk of infection, and risk of rejection. While many other organ transplantations (e.g., heart or liver transplantation) are life-saving, face transplantation is a non-life saving reconstructive procedure. Moreover, face transplant recipients need to take immunosuppressive drugs for the remainder of their lives and, despite dramatic improvements in the safety of modern immunosuppressive protocols, they continue to suffer from adverse effects, a fact which raises ethical doubts regarding the legitimacy of face transplantation given its non-life saving nature. Furthermore, the effectiveness of immunosuppressive treatment in preventing chronic rejection remains unclear.
The CTA Working Group of the European Society for Organ Transplantation (Schneeberger et al, 2011) stated that more than 60 hand/forearm/arm transplantations as well as 16 face transplantations have been performed in the past 12 years. In the European experience, 3 grafts have been lost in response to a vascular thrombosis (n = 1), rejection and incompliance with immunosuppression (n = 1) and death (n = 1). The overall functional and esthetic outcome is very satisfactory, but serious side effects and complications related to immunosuppression are challenges hindering progress in this field. The high levels of immunosuppression, skin rejection, nerve regeneration, donor legislation and the acceptance level need to be addressed to promote growth of this promising new field in transplantation and reconstructive surgery.
Pomahac and colleagues (2011) stated that face transplantation has the unique potential to restore facial form and function in patients with severe facial defects. Current indications for face transplantation remain limited by unknown long-term outcomes and the requirements for life-long immunosuppression and substantial plans for reconstruction in case of failure. These investigators initially obtained Institutional Review Board approval for partial face transplantation in patients with defects comprising 25 % of the face and/or loss of 1 or more major facial features. They launched an outcome-oriented face transplantation study and screened 13 potential patients between February 2008 and January 2011. Experience gained during screening motivated the expansion of indications to include full facial defects and the consideration of patient-specific complex issues on a case-by-case basis. Although the authors' program focuses on restoring absent or severely compromised motor and sensory functions, they recognize aesthetic appearance as a crucial facial function. Patients are extensively educated on the risks and benefits of facial transplantation and then allowed to play the main role in the decision-making process, as long as no absolute exclusion criteria are present. As more data about the long-term outcomes of face transplantation and safe reduction of immunosuppression are gathered, face-transplant indications may expand from major unreconstructable defects towards potentially minor defects.
Siemionow and Ozturk (2012) stated that since 2005, 17 facial allo-transplantations have been performed worldwide. These investigators presented a brief summary of current cases with ongoing concerns. A total of 15 publications were reported for 10 facial allo-transplantations. For the remaining 7 transplantations, information was gathered from scientific meeting presentations and media releases. The summary of current cases in terms of etiology, indications, results, complications, and outcomes were based on these data. The discussion of ongoing concerns, controversies, and overview of future implications was accomplished by reviewing the literature of ethical debates, experimental studies, clinical studies, and personal opinion. Two of the 17 face transplant recipients died. Overall survival rate was 88 %. No early graft loss due to technical failure was reported. All reported cases that have more than 1-year follow-up had at least 1 acute rejection episode, which was reversible with treatment. Opportunistic infections and metabolic complications were observed as adverse effects. Motor recoveries were slower than the sensorial recoveries, as expected. Functional and aesthetic outcomes were satisfactory. Concerns and controversies about concomitant face and hand transplantation, recipient blindness, recipient age, primary reconstruction option in facial trauma cases, funding, graft failure risks, and future treatment options were discussed. The authors concluded that because of uncertainty about long-term outcomes, immunosuppression-related concerns and ethical debates limit world-wide application of facial allo-transplantation. However, in selected group of patients, it is an unique reconstruction method with promising outcomes. They stated that further research and investigation in transplant immunology and treatment hold the key to advance this treatment option.
Baccarani et al (2013) stated that total face transplantation is now a clinical reconstructive option in the treatment of patients with acquired facial deformity. These investigators reviewed the status of total face transplantation based on their clinical experience in dealing with traditional microsurgical head and neck reconstructions and on the basis of their published pre-clinical research investigating technical aspects of the facial allo-transplantation procedure in cadaveric models. The authors first discussed the harvesting options and proposed 2 facial flaps, which addressed different reconstructive needs. Next, the concept of donor-recipient anatomical compatibility was introduced, and the possible outcome of the chimeric face was studied, following the insetting of a fascio-cutaneous facial allograft. Finally, the authors addressed the major technical challenges associated with transplanting the most complex osteomyocutaneous allograft. Significant improvement has been made in the field of vascularized composite tissue allo-transplantation over the last 5 to 6 years. They stated that the results of the 13 face transplants performed worldwide are encouraging both functionally and aesthetically, when compared with traditional reconstructive procedures.
Sedaghati-Nia et al (2013) stated that the face-grafting techniques are innovative and highly complex, requiring well-defined organization of all the teams involved. Subsequent to the first report in France in 2005, there have been 17 facial transplantations performed worldwide. These investigators described anesthesia and post-operative management, and the problems encountered, during the course of 7 facial composite tissue grafts performed between 2007 and 2011 in their hospital. The reasons for transplantation were ballistic trauma (n = 4), extensive neurofibromatosis (n = 2), and severe burns (n = 1). Anesthesia for this long procedure involves advanced planning for airway management, vascular access, technique of anesthesia, and fluid management. Preparation and grafting phases were highly hemorrhagic (greater than 1 blood volume), requiring massive transfusion. Median (range) volumes given for packed red cell (PRC) and fresh-frozen plasma (FFP) were 64.2 ml/kg (35.5 to 227.5) and 46.2 ml/kg (6.3 to 173.7), respectively. Blood loss quantification was difficult because of diffuse bleeding to the drapes. The management of patients with neurofibromatosis or burns involving the whole face was more difficult and hemorrhagic than the patients with lower face transplantation. Average surgical duration was 19.1 hrs (15 to 28). Post-operative severe graft edema was present in most patients. Most patients encountered complications in the intensive care unit, such as renal insufficiency, acute respiratory distress syndrome, and jugular thrombosis. Opportunistic bacterial infections were a feature during the post-operative period in these highly immunosuppressed patients.
Gordan et al (2013) noted that sex-specific anthropometrics, skin texture/adnexae mismatch, and social apprehension have prevented cross-gender facial transplantation from evolving. However, the scarce donor pool and extreme wait-list times are currently sub-optimal. These researchers (i) performed and assessed cadaveric facial transplantation for each sex-mismatched scenario using virtual planning with cutting guide fabrication, and (ii) reviewed the advantages/disadvantages of cross-gender facial transplantation. Cross-gender facial transplantation feasibility was evaluated through 2 mock, double-jaw, Le Fort-based cadaveric allotransplants, including female donor-to-male recipient and male donor-to-female recipient. Hybrid facial-skeletal relationships were investigated using cephalometric measurements, including sellion-nasion-A point and sellion-nasion-B point angles, and lower-anterior-facial-height to total-anterior-facial-height ratio. Donor and recipient cutting guides were designed with virtual planning based on the team's experience in swine dissections and used to optimize the results. Skeletal proportions and facial-aesthetic harmony of the transplants (n = 2) were found to be equivalent to all reported experimental/clinical sex-matched cases by using custom guides and Mimics technology. Cephalometric measurements relative to Eastman Normal Values are shown. The authors concluded that on the basis of these findings, they believe that cross-gender facial transplantation can offer equivalent, anatomical skeletal outcomes to those of sex-matched pairs using pre-operative planning and custom guides for execution. Lack of literature discussion of cross-gender facial transplantation high-lighted the general stigmata encompassing the subject. The authors hypothesized that concerns over sex-specific anthropometrics, skin texture/adnexae disparity, and increased immunological resistance have prevented full acceptance thus far. Advantages of cross-gender facial transplantation include an increased donor pool with expedited reconstruction, as well as size-matched donors.
Bergfeld et al (2013) noted that in December of 2008, their institution performed a near total face transplant. The patient was monitored for signs of rejection assessed by paired skin and mucosa biopsies. The results of histological review of 120 biopsies collected during the first 4 years post-transplant were discussed. All biopsies were stained with hematoxylin and eosin, periodic acid-Schiff, immunohistochemical and TUNEL assays and graded using the Banff 2007 classification. Grade III rejection was diagnosed clinically at weeks 45 and 66, post-transplant; week 45 was determined as folliculitis while the erythema episode at week 66 confirmed an acute rejection (AR) that required hospitalization. The mucosa frequently showed inter-face inflammation without clinical signs of rejection and was not present in skin biopsies. In all, 34 of the 45 mucosal biopsies (75 %) showed these inter-face changes. Clinical symptoms concurred with skin pathology in 2 grade III rejections. The mucosa showed histologic signs of rejection more frequently, which may indicate: increased mucosal sensitivity to rejection, a different type or subtype of AR that is specific to the mucosa, or a non-specific process such as a drug effect. The authors stated that with more data and world experience, the diagnosis of face transplant rejection will be better defined and the Banff classification enhanced.
The need for lifelong immunosuppression and unpredictable functional outcomes preclude face transplantation from routine acceptance in clinical practice. There is currently a clinical trial at the Brigham and Women's Hospital (Boston, MA) that aims to develop the best practices for facial transplantation, which will improve the outcomes of future face transplant recipients. The estimated number of enrollment is 5; and the estimated study completion date is February 2012. The inclusion as well as exclusion criteria of this clinical trial are as follows:
- Age between 18 and 60 years
- Loss of a major part of the face (e.g., the nose or the lips, or at least 25 % of the facial tissue)
- Signed written informed consent
- The facial defect can not be restored with traditional reconstruction techniques
- Willing to complete psychological and social evaluations
- Willing to take immunosuppressants for life
- Willing to return for follow-up visits as determined by the treating physician and to comply with extensive post-transplant rehabilitation therapy
- Willing to receive standard vaccinations prior to the transplant (e.g., influenza and hepatitis B)
- Absence of adequate donor sites for skin grafting in the event of transplant failure
- Active malignancy
- Any diagnosis that puts the subject at risk during the face transplant surgery
- Findings of psychological evaluation that indicate inability to comply with physician's orders or mental instability
- High risk of return of malignancy
- History of persistent non-compliance
Murphy et al (2013) noted that in vascularized composite allotransplantation (VCA), multiple types of tissue are transferred from donor to recipient as a single functional unit. This technique has been performed for upper extremity, face, and abdominal wall transplants, among many others. These investigators reviewed the existing cases of face and upper extremity VCA performed to-date and described the functional outcomes and challenges associated with this new procedure. They also reviewed the immune suppression protocols required for these procedures. A literature review was performed using PubMed and online registries where available to identify patients who have undergone upper extremity and face transplant procedures. These were compiled and cross-referenced to abstracts, conference presentations, and press releases in the media to create a list of procedures performed to date. More than 70 patients have undergone upper extremity transplantation with very good functional outcomes routinely achieved; 25 face transplants were identified that have been completed to-date and details regarding patient outcome were included. One cases of human face allotransplantation with pre- and post-operative images was included as an example of what can be achieved with this technique. The authors concluded that VCA is an emerging field that provides an exciting new avenue for reconstructive procedures and achieves functional and cosmetic outcomes not previously possible with existing techniques. However, these investigators stated that VCA is not without its challenges and considerable work is still needed before widespread adoption of these new reconstructive techniques.
Diaz-Siso and colleagues (2013) stated that VCA is a viable treatment option for injuries and defects that involve multiple layers of functional tissue. In the past 15 years, more than 150 VCA surgeries have been reported for various anatomic locations including, but not limited to, trachea, larynx, abdominal wall, face, and upper and lower extremities. Vascularized composite allotransplantation can achieve a level of esthetic and functional restoration that is currently unattainable using conventional reconstructive techniques. Although the risks of lifelong immunosuppression continue to be an important factor when evaluating the benefits of VCA, reported short- and long-term outcomes have been excellent, thus far. Acute rejections are common in the early post-operative period, and immunosuppression-related side effects have been manageable. A multi-disciplinary approach to the management of VCA has proven successful. Reports of long-term graft losses have been rare, while several factors may play a role in the pathophysiology of chronic graft deterioration in VCA. Alternative approaches to immunosuppression such as cellular therapies and immunomodulation hold promise, although their role is so far not defined. The authors concluded that experimental protocols for VCA are currently being explored.
Infante-Cossio and associates (2013) provided an update on clinical results obtained by the first world-wide facial transplantation teams and reviewed the literature concerning the main surgical, immunological, ethical, and follow-up aspects described on facial transplanted patients. A total of 18 clinical cases were studied. The mean patient age was 37.5 years, with a higher prevalence of men. Main surgical indication was gunshot injuries (6 patients). All patients had previously undergone multiple conventional surgical reconstructive procedures that had failed. Altogether 9 transplant teams belonging to 4 countries participated; 13 partial face transplantations and 5 full face transplantations had been performed. Allografts were varied according to face anatomical components and the amount of skin, muscle, bone, and other tissues included, though all were grafted successfully and remained viable without significant post-operative surgical complications. The patient with the longest follow-up was 5 years; 2 patients died 2 and 27 months, respectively, after transplantation. The authors concluded that clinical experience had demonstrated the feasibility of facial transplantation as a valuable reconstructive option, but it still remains considered as an experimental procedure with unresolved issues to settle down.
Pomahac et al (2014) stated that VCA is a novel therapeutic option for treatment of patients suffering from limb loss or severe facial disfigurement. To-date, 72 hand and 19 facial transplantations have been performed worldwide. Vascularized composite allotransplantation in hand and facial transplantation is a complex procedure requiring a multi-disciplinary team approach and extensive surgical planning. Despite good functional outcome, courses after hand and facial transplantation have been complicated by skin rejection. The authors concluded that long-term immunosuppression remains a necessity in VCA for allograft survival. To widen the scope of these quality-of-life-improving procedures, minimization of immunosuppression to limit risks and side effects is needed.
Kueckelhaus and colleagues (2014) stated that VCA is utilized for restoration of complex defects. In this context, restoration describes the replacement of destroyed tissue by identical anatomic structures. To-date, over 150 VCAs including 31 face transplantations have been performed world-wide. Face transplantation is a life-giving, rather than life-saving procedure that is intended to significantly improve the patient's quality of life. Safe re-vascularization as well as aesthetic and functional re-integrations are the ultimate goals of face transplantation. The necessary lifelong immunosuppression with potentially life-threatening side effects imposes the need for a very strict risk-benefit ratio assessment and currently limits the indications of face transplantation. Different transplant centers use different protocols for induction and maintenance immunosuppression. Skin is the most immunogenic part of the vascularized composite allograft and has been the focus of intensive research efforts in order to replicate the success of immunosuppressive regimens for solid organ transplantation. Organ preservation during transfer from donor to recipient is another important field of research within VCA. The general public's originally rejecting attitude towards non-lifesaving VCA procedures has changed towards a general acceptance following the publication of promising results after the first cases of face transplantation. The authors concluded that further improvements of surgical techniques and immunosuppressive strategies will be important to drive these young and exciting procedures forward in the future.
Smeets et al (2014) face transplantation is an innovative achievement of modern reconstructive surgery and is on the verge of becoming a common surgical opportunity. These researchers provided an update on this surgical field, especially regarding clinical outcomes, benefits, and complications implied. They performed an extensive research on all English-language Medline articles, case reports, and reviews published online until September 15, 2013. Used search terms were "face transplantation", "face transplant", "facial transplantation", "facial transplant", "face allograft", and "facial allograft". To-date, a total of 27 FTs had been performed world-wide; 19 of these cases have been published in the Medline database. Long-term follow-up reports of FT cases are rare; 3 deaths associated with the procedure have occurred to-date. The clinical outcomes of face transplantation are satisfying. Re-innervation of sensation has been faster than motor recovery. Extensive functional improvements had been observed. Due to strict immunosuppression protocols, no case of hyper-acute or chronic rejection and no graft-versus-host disease have occurred to-date. The authors concluded that as studies on long-term outcomes are missing, particularly regarding immunosuppression-related complications, face transplantation will stay experimental for the next years.