[Chest wall distraction in thoracogenic scoliosis]. 
Combined congenital scoliosis and rib fusion associated with other chest deformities during infancy can lead to a progressive hypoplastic thorax that could be unable to support normal lung growth and respiratory function.  Campbell introduced an expansion thoracoplasty technique in which fused ribs are separated and a vertical expandable prosthetic titanium rib is used as a chest wall distraction device to enlarge the affected hemithorax.  This technique benefits the underlying lung by improving the thoracic volume and the respiratory function.  Four patients (3 boys and 1 girl) with severe unilateral thoracic deformity with combined scoliosis and rib fusion plus a restrictive respiratory insufficiency are presented herein; 1 of them needed continuous CPAP preoperatively.  All had progressive scoliosis and failure to thrive.  Preoperative evaluation included three-dimensional CT reconstruction.  A thoracic expansion placing an intercostal vertical expandable prosthetic titanium device as a chest wall distractor was performed.  Afterwards, distraction control was made every four months.  Our 4 patients had a satisfactory outcome.  Scoliosis was corrected and there were improvements of volume and function of the thorax.  The placement of an intercostal distractor device improves the thoracic insufficiency syndrome, lengthening and expanding the thoracic cage at the same time.  These effects benefit respiratory function and correct scoliosis, allowing an adecuate lung function.