Extensor hallucis longus transfer for hallux varus deformity.

The hallux varus deformity results from a dynamic imbalance of the tendons that cross the first metatarsophalangeal joint. This condition most frequently occurs after McBride-type operative treatment for hallux valgus. A new procedure, developed to correct this imbalance, involves transferring the extensor hallucis longus beneath the first intermetatarsal ligament into the base of the proximal phalanx, along with an arthrodesis of the first interphalangeal joint. This procedure in fifteen affected great toes gave over-all satisfactory correction of the hallux varus deformity.