Scheuermann’s disease is a poorly defined condition. It presents mostly in teenagers below skeletal maturity as a significant structural deformity of thoracic kyphosis.
Cause
The cause is unknown, but is considered to be a form of juvenile osteochondrosis of the spine. There may be a genetic component contributing to the condition (Graat et al, 2002). The individual vertebrae grow unevenly in the saggital plane, resulting in an anterior wedging of the vertebrae causing a kyphosis of more than 40°. The 7th and 10th thoracic vertebrae are most commonly affected (Saada et al, 2000).
Prevalence
Estimated prevalence is variable between 0.4% and 10% (Moquin et al, 2003).
Presentation
Scheuermann’s disease can cause lower and mid-level back and neck pain. The patient may feel pain at the apex of the curve, aggravated by physical activity and periods of standing or sitting. In addition to pain, many patients have loss of vertebral height, and may have an accentuated kyphosis. Lower thoracic kyphosis may cause more pain, whereas upper thoracic kyphosis may present a more visual deformity. In very serious cases it may cause visceral symptoms and spinal cord compression, but these are extremely rare (Summers et al, 2008).
Patients with Scheuermann’s disease cannot consciously correct their kyphosis deformity. Associated pain may reduce when the person reaches skeletal maturity (Saada et al,2000).