We retrospectively reviewed the cases of 10 consecutive patients treated with hemivertebral excision for congenital scoliosis at The Children's Hospital, Denver, CO, between 1982 and 1992. Follow-up consisted of physical and radiographic examination and averaged 54 months (range, 4-111). Age at surgery ranged from 9 months to 10 years, 5 months (average, 3 years, 11 months). Hemivertebra levels were between T12 and L3. The average preoperative curve measured 40 degrees (range, 20-55 degrees); the average at latest follow-up was 16 degrees (range, 3-37 degrees). We found hemivertebral excision for congenital scoliosis to be a safe and effective means of treatment. Curve correction averaged 67% and seemed to be greatest in those less than 4 years of age at the time of surgery.