Unilateral humeral lengthening in children and adolescents.

This study evaluates our early experience with unilateral humeral lengthening in children and adolescents. From 1995 till 2001, 16 cases with unilateral humeral shortening ranging from 5.5 to 15 cm were referred to our center. The cause was Erb's palsy in eight cases, epiphyseal injury in five cases and infection in three cases. The average age at operation was 13 years (range 8.5-17 years). Hybrid fixation using wires and half pins were applied to all cases to minimize the risk of operative neurovascular complications. Osteotomy was performed in the middle third of the humerus through a posterior approach. After a latent period of 5-7 days lengthening started at a rate of 0.33 mm every 8 h. At an average follow up of 3 years and 2 months (range 1 year and 4 months to 5 years and 6 months) there were 10 excellent and six good results. The average healing index was 28 days/cm. Complications included pin tract infection in all cases; radial nerve palsy in one patient whose humerus overlengthened by 2 cm but improved completely after compression; fracture of the regenerate in two cases.