Upper extremity transplantation: current concepts and challenges in an emerging field

Area of Science:

• Surgical Innovation
• Regenerative Medicine
• Transplantation Immunology

Background:

• Upper limb loss causes significant physical and emotional impairment.
• Prosthetic limitations include poor function, discomfort, and high rejection rates.
• Bilateral amputees face profound disability and dependency despite prosthetic advancements.

Purpose of the Study:

• To review the historical background of hand transplantation.
• To discuss current literature and concepts in upper limb transplantation.
• To highlight challenges and controversies in Vascularized Composite Allotransplantation (VCA).

Main Methods:

• Literature review of hand and upper extremity transplantation.
• Analysis of historical data and current research in VCA.
• Synthesis of concepts regarding transplantation indications, immunosuppression, and rejection monitoring.

Main Results:

• Hand and upper limb transplantation restores greater sensibility and motor control than prosthetics.
• Transplantation offers better dexterity and function, replacing the limb with a similar match.
• Immunosuppression, rejection, and cost are major drawbacks of transplantation.

Conclusions:

• Vascularized Composite Allotransplantation (VCA) for upper limbs is a growing field.
• Key challenges include refining indications, optimizing immunosuppression, and standardizing outcomes.
• Transplantation presents a promising alternative to prosthetics, but requires careful management of risks.