We’re BACK! This week we are celebrating the relaunch of our Instagram cases with a series of entities affecting the spine. AP Radiograph of the spine shows an S-shaped curvature typical of adolescent idiopathic scoliosis. Adolescent idiopathic scoliosis is the most common spinal abnormal affecting 2-3% of children. The adolescent form begins to develop during the major growth spurt. Severe curves are more common in girls. However, mild curves occur with equal frequency in boys and girls.