A corrective dome osteotomy was performed in 19 adult patients for cubitus varus and valgus deformity. The mean age at operation was 31.1 years and the mean follow-up was 41 months. The average postoperative carrying angle in 16 patients with cubitus varus was 6.1 degrees (range, 1-10 degrees), an average correction of 24 degrees (range, 5-36 degrees). The average postoperative carrying angle in 3 patients with cubitus valgus was 6.7 degrees (range, 6-7 degrees), an average correction of 29.3 degrees (range, 29-30 degrees). None of the patients had recurrence of deformity, unsightly scarring, or a prominent lateral or medial condyle at final follow-up. An excellent result was achieved in 13 patients and good in 6. We conclude that corrective dome osteotomy with secure fixation using plates and screws is a reliable option for cubitus varus or valgus deformity in adults.