In this type of treatment a metal rod attached to the spine is periodically lengthened by a simple procedure. It is usually attached to the spine on the top and then either attached to the spine or the hips on the bottom with the rod in between. Most often it involves two rods. The difference between this and a full spinal fusion is that there are only screws placed in the spine at the top and the bottom of the rod and not in between. This allows continued growth of the spine. In the post-operative period there is no casting or bracing necessary and they can return to full sports after about 6 months. The rods are generally lengthened every 6-9 months depending on the age of the child. The lengthenings take place under general anesthesia. Only a small portion of the incision is used to lengthen the device. Many children can go home the same day but this depends on several factors and some children stay overnight. Many children are then able to return to school after a couple of days and back to activities as tolerated.