[Is it too late to start orthopedic treatment for idiopathic scoliosis with Risser scores of 4?]. / Est-il trop tard pour entreprendre un traitement orthopédique pour scoliose idiopathique à Risser 4 ?

Orthopaedic treatment for idiopathic scoliosis in adolescence is indicated with a curve of > or =20 degrees and a Risser score< or =4, because progression of curve is low with Risser scores >4. We present the case of a young man with a left lumbar idiopathic scoliosis (T12-L4) with a curve of 10 degrees, which was stable from 13 years (Risser 0) to 16 years old (Risser 4). The scoliosis progressed quickly after a Risser score of 4 was achieved. The man had been wearing a lift on the left foot since he was 13, because of a leg length discrepancy, and had been under clinical and radiological monitoring. When the boy reached 17 years, the scoliosis rapidly progressed, to a curve of 22 degrees and a Risser score of >4. The scoliosis was effectively treated with a Boston brace. At 20 years, the Risser score was 5, and the left lumbar curve was 13 degrees after discontinuing the use of the brace. To our knowledge, no scientific reference indicates a time limit to orthopaedic treatment for idiopathic adolescent scoliosis. Despite the experts' recommendations, a brace might be indicated with a Risser score > or =4 to stop the progression of the curve.