Thumb reconstruction by free microvascular transfer of an injured index finger.

Thumb reconstruction for amputation at the metacarpal phalangeal level was accomplished by microneurovascular transfer of the contralateral damaged index finger ray, including metacarpal phalangeal joint. This transfer accomplished a successful thumb restoration and removed a cumbersome index finger amputation stump, improving function in both hands. This case emphasizes the merits of spare part transfer in hand reconstructive surgery made possible by microneurovascular techniques.