Brachymetatarsia of the first metatarsal treated by surgical lengthening.

The first metatarsal of six feet in four patients was surgically lengthened. Brachymetatarsia was caused by a congenital defect in two patients, nonunion after metatarsal osteotomy in one patient, and premature physeal closure associated with pin placement across the physis in one patient. In each patient, middiaphyseal osteotomy was performed, pins were placed into the proximal and distal metatarsal fragments, and an external distracting device was attached. After distraction, a fibular graft was inserted and the device was removed. The percentage of metatarsal length gained from the lengthening averaged 36% (range 12-68%). The fibular graft healed in the lengthened position in all patients.