"Mirror image" congenital scoliosis in siblings.

Congenital scoliosis, which is caused by isolated anomalies (as opposed to multiple spinal anomalies and myelomeningocoele), is usually a nonfamilial condition. In rare instances, however, a congenital spine deformity is genetically determined. We herein report a brother and sister with a nearly identical "mirror image" congenital lumbar scoliosis. We conclude that the presence of a congenital spine deformity necessitates the screening of other siblings for a similar anomaly.