Single-Stage Metacarpal Lengthening for Traumatic Metacarpal Malunion: A Case Report and Surgical Technique.

A novel technique that requires a single-stage operation utilizing an intramedullary device is presented for metacarpal lengthening in setting of traumatic malunions. The patient desired surgical correction due to malrotation with full fist formation and a 25-degree extensor lag. Following single-stage lengthening with osteotomy, bone graft, and intramedullary screw, length was restored and the patient had full passive range of motion. The patient's graft site incorporated well with robust callus formation with mild resorption and collapse. Clinically, he maintained appropriate rotation and had a 5-degree extensor lag with the ability to make a composite fist. The patient was satisfied with his result and returned to normal activities.