Scoliosis is a common paediatric condition with a prevalence of up to 5%.1 True scoliosis is three-dimensional, with rotation evident at the apex of the curve, and a Cobb angle >10°. Lateral curvature, from issues such as poor posture, muscle spasm or leg length discrepancy, can masquerade as scoliosis.2 The cause of structural scoliosis, where rotation is present, is idiopathic in 75% of cases, neuromuscular (eg cerebral palsy, spina bifida, muscular dystrophy) in 10% of cases, congenital (eg failure of formation or segmentation) in another 10% of cases and due to many other rare causes in 5% of cases.2
Idiopathic scoliosis most commonly occurs between the ages of 10 and 18 years. A typical adolescent idiopathic scoliosis patient is female with a convex right thoracic curve or convex left lumbar curve, right shoulder elevated, right rib prominence, no neurological deficits and no significant pain.2 Although boys and girls are equally affected with small curves, curves >40° are sevenfold more frequent in girls.1 Concerning curves include early onset scoliosis, premenarchal scoliosis with a curve >25° and skeletally mature patients with curves >50°.2