Microsurgical transfer of the second toe for congenital deficiency of the thumb.

Twelve second-toe transfers have been performed to substitute for thumbs congenitally deficient through constriction ring syndrome, symbrachydactyly, and true transverse arrest. The children were on average 3 years of age, and the youngest was undertaken at 10 months. Anatomic variations were the rule in the six cases of transverse absence and the three cases of symbrachydactyly, requiring nerves, tendons, and vessels in the toe be connected to whatever appropriate structure could be located. All transfers survived, and only one required exploration. Sensation appeared good in the 11 seen in later review, but interphalangeal motion was achieved in only 3. However, good use was made of the digit by all except one patient, an early patient in whom there was not an adequate skeleton on which to base the transfer. This small series suggests that in appropriate cases toe transfer can be undertaken early for congenital deficiency with little fear of encountering microsurgical problems unique to the infant.