Impact of Reconstructive Transplantation on the Future of Plastic and Reconstructive Surgery

Maria Siemionow, MD, PhD, DSc ^a^,^b^,^*

^a Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland Clinic, 9500 Euclid Avenue, Desk NA-21, Cleveland, OH 44195, USA

^b Department of Plastic Surgery, Cleveland Clinic, 9500 Euclid Avenue, Desk A-60, Cleveland, OH 44195, USA

^* Department of Plastic Surgery, Cleveland Clinic, 9500 Euclid Avenue, Desk A-60, Cleveland, OH 44195.

E-mail address: siemiom@ccf.org

Abstract

This article summarizes the current knowledge on the new developing field of reconstructive transplantation. A brief outline of vascularized composite allografts (VCA) such as human hand, face, larynx, and abdominal wall transplants is provided. The clinical applications and indications for these new reconstructive transplantation procedures are outlined. The advantages, disadvantages, and complications and concerns surrounding clinical VCA are discussed. Finally, the impact of reconstructive transplantation on the future of plastic and reconstructive surgery is presented.

Keywords

• Vascularized composite allografts • Disadvantages of reconstructive transplantation • Face transplant • Hand transplant • Abdominal wall transplant • Laryngeal transplant • Tracheal transplant

Introduction of reconstructive transplantation into plastic surgery

The past 2 decades has seen an ongoing search for new reconstructive options to restore functional and esthetic deficits of patients with severe deformities of the face, extremities, hands, and other parts of the body for which application of currently available reconstructive options resulted in less-than-optimal outcomes.

The major problem with reconstruction of complex posttraumatic deficits on the face and extremities was a lack of available tissues that resembled the injured or missing parts, such as the nose, lips, or eyelids in the case of facial deformities, or the lack of spare parts, such as joints, fingers, or hands in cases of extremity injuries involving amputations.

Conventional techniques allowed for staged reconstruction of these deformities, providing coverage, tissue expansion, and functional restoration with borrowed tissues, including free tissue transfers or a combination of all available techniques.

The well-established microsurgical techniques contributed significantly to the field of reconstructive surgery by introducing procedures such as toe-to-hand transfers, for example, in which missing functions were restored often in one surgical attempt.

The tradeoff, however, included significant donor site morbidity, lack of perfect function restoration, and less-than-optimal esthetic outcomes. In many situations, multiple reconstructive attempts were undertaken, thus limiting sources of available autologous tissues over time, and often leaving patients with the visible stigma of posttraumatic disfigurement.

Autologous free tissue transfers and replantation procedures introduced the idea of tissue transplantation as a method of functional and esthetic restoration. The major advantage of this approach was the fact that autologous transplants did not require immunosuppression to keep the grafts alive. The major disadvantage, however, was the awkward esthetic outcome of single or multiple flaps of varying color and bulkiness used for facial coverage, or the combination of flaps and short toes sticking out from deformed hands.

As a result of the lack of “specialized spare parts” that could be borrowed from the bodies to restore missing functions, the idea of reconstructive transplantation was borne and introduced to plastic surgery. It was based on more than 20 years of experimental and preclinical work testing the technical, functional, and, most importantly, immunologic aspects of reconstructive transplantation.¹^–¹⁵

Plastic and reconstructive surgery embraced the new field of reconstructive transplantation using vascularized composite allotransplants (VCAs), such as human hand, face, larynx, trachea, abdominal wall, and lower extremity transplants, and included these into the armamentarium of plastic surgery.

This article discusses the current and future impact of reconstructive transplantation on the field of plastic and reconstructive surgery.

Reconstructive transplantation as an alternative surgical option

Reconstructive transplantation includes VCAs and involves transplantation of tissues derived from ectoderm and mesoderm. VCAs typically contain skin, fat, muscle, nerves, lymph nodes, bone, cartilage, ligaments, and bone marrow as opposed to a single tissue organ, which is the case in conventional solid organ transplantation. An example of VCA is limb transplantation, in which the transplanted graft includes skin, muscle, nerve, blood vessels, and bone. The function and immunologic properties of the composite tissue transplant are more difficult to define, because each individual component has its own unique characteristics that ultimately affect the successful outcome of the transplantation. Most applications of VCA predominantly improve quality of life for patients with non–life-threatening conditions and aim to restore anatomic, cosmetic, and functional integrity. The benefits gathered from these procedures must be balanced against the morbidity of the surgical procedure itself, the side effects of lifelong immunosuppression therapy, and the cost of surgery and immunosuppressive medications (Box 1).

Disadvantages

• Need for life-long immunosuppressive therapy

• Need for adequate matching between the donor and recipient (age, sex, race)

• Increased risks of comorbidities (viral and bacterial infections, lymphoproliferative disorders, diabetes, avascular necrosis of bones)

• Risk of acute or chronic rejection

• Need for the rescue protocol in the case of VCA rejection

• Social, ethical, and psychological issues

• Significant cost of immunosuppressive therapy

Advances in VCA transplantation have opened a new era in the field of reconstructive surgery. Since 1998, after the report on the first successful hand transplantation in France, the field of VCA has further developed, opening new alternatives for patients who have lost their extremities and hands.¹⁶

On November 15, 2004, Dr Maria Siemionow at Cleveland Clinic received the world’s first Institutional Review Board (IRB) approval to perform face transplantation in humans. This event opened a new era in reconstructive surgery of the human face.

On November 27, 2005, in Amiens, France, a surgical team led by Drs Bernard Devauchelle and Jean-Michel Dubernard announced that they had performed a partial face transplant on a 38-year-old woman whose face had been disfigured by a dog bite.¹⁷ To date, a total of 19 face transplantations have been performed worldwide in France, China, the United States, and Spain.¹⁸^–³²

The world’s first near-total face transplantation was performed in Cleveland in December 2008 by a team led by this author.²³ This procedure was, until now, the most complex face transplant, involving restoration of 3-dimensional craniofacial skeleton with multiple functional units.

Cleveland Clinic Near-Total Face Transplantation Procedure

The patient was a 45-year-old woman who experienced severe facial trauma to her midface from a close-range shotgun blast in September 2004. Her facial deformities included absence of nose, nasal lining, and underlying bone; contracted remnants of the upper lip; loss of orbicularis oris and orbicularis oculi muscle functions; distorted and scarred lower eyelids with ectropion; right-eye enucleation supported by eye prosthesis; and facial nerve deficit manifested by the lack of midface function (Fig. 1).

Fig. 1 Patient views before face transplantation. Left and right profiles indicate craniofacial defect with missing nose, upper lip, and lower eyelids contracted by massive scar tissue.

(From Siemionow MZ, Djohan R, Bernard S, et al. The Cleveland Clinic experience with the first US face transplantation. In: Siemionow MZ, editor. The knowhow of face transplantation. London: Springer-Verlag; 2011. p. 343, Fig. 33.1; with permission.)

Before face transplantation, the patient had undergone 23 major autologous reconstructive operations that included correction of bone defects with free fibula and split-calvaria/rib grafts; soft-tissue defects with anterolateral free flap, temporalis muscle flap, paramedian forehead flap, and radial forearm free flap; and skin defects with multiple split-thickness skin grafts.

The donor was a brain-dead woman who matched the patient in age, race, and skin complexion. The allograft was designed to cover the recipient’s anterior craniofacial skeleton, and it included approximately 80% of the surface area of the anterior face. It was based on a Le Fort III composite tissue allograft containing total nose, lower eyelids, upper lip, total infraorbital floor, bilateral zygomas, and anterior maxilla with incisors, and included total alveolus, anterior hard palate, and bilateral parotid glands (Fig. 2).^24,²⁵

Fig. 2 Schematic illustration of the first U.S. near-total face transplantation (for patient in Fig. 1). Figures representing recipient defect before allograft insert (top left and bottom left) illustrating the need for a 3-dimensional craniofacial reconstruction. This face allograft included more than 535 cm² of facial skin, functional units of full nose with nasal lining and bony skeleton, lower eyelids and upper lip, and underlying muscles and bones, including orbital floor, zygoma, maxilla with teeth, hard palate, parotids and nerves, and arteries and veins (top right and bottom right).

(Courtesy of The Cleveland Clinic Education Institute (CCEI) and staff illustrator Mark Sabo, BFA, Cleveland, OH; with permission.)

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