The Natural History of Scheuermann's Kyphosis

Area of Science:

• Orthopedics
• Adolescent Medicine
• Spinal Deformities

Background:

• Adolescent idiopathic kyphosis, or Scheuermann's kyphosis (SK), is a spinal deformity affecting up to 8% of adolescents.
• It is characterized by structural vertebral wedging and a kyphotic Cobb angle exceeding 45°.

Purpose of the Study:

• To review the long-term progression and outcomes of untreated Scheuermann's kyphosis.
• To consolidate understanding of SK behavior across the lifespan and identify predictors of functional difficulty.

Main Methods:

• Review of multiple decades of research on untreated Scheuermann's kyphosis.
• Integration of findings from landmark studies and longitudinal cohorts.

Main Results:

• After skeletal maturity, SK curves progress slowly (0.3-0.5°/year), rarely exceeding 100°.
• Curves over 75° with forward sagittal imbalance are associated with greater disability.
• Radiographic size alone doesn't predict symptoms; combined deformity and loss of global alignment are key indicators.

Conclusions:

• Conservative management (physiotherapy, bracing) is effective for most patients.
• Surgical consultation is reserved for cases with progressive imbalance or persistent pain.
• Understanding untreated SK progression aids in advising families and guiding treatment decisions.