Scheuermann’s disease is a deformity in the thoracic spine in children. Patients with Scheuermann’s disease ( also referred to as juvenile kyphosis) have an increased kyphosis in the thoracic spine. What this means, is that the normal spinal round-back in the upper spine (this is the kyphosis), is increased. This increased curve often causes back pain and muscle fatigue with the back. Patients with this spinal disorder are usually between the ages of 10-15.