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European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·2026·Meta-analysis
Kyphosis
Excessive forward curvature of the thoracic (upper) spine
ICD-10: M40.04 · thoracic condition
Kyphosis refers to an exaggerated forward rounding of the spine, most commonly in the thoracic (mid-back) region. While the thoracic spine naturally curves 20–45 degrees, kyphosis is diagnosed when the curve exceeds 50 degrees. It ranges from postural kyphosis — a flexible, habit-related rounding — to structural forms including Scheuermann's kyphosis (a developmental condition in adolescents) and kyphosis caused by osteoporotic vertebral compression fractures in older adults. Severe kyphosis can compress the lungs, cause chronic pain, and significantly affect quality of life.
Symptoms
- Visible rounding or "hunchback" appearance of the upper back
- Mild to moderate upper and mid-back pain or fatigue
- Stiffness in the thoracic spine
- In severe or Scheuermann's kyphosis: rigid, fixed curve that does not correct with posture changes
- Height loss over time as vertebrae collapse (osteoporotic kyphosis)
- Breathing difficulties or reduced lung capacity in severe cases
- Neurological symptoms (rare): weakness or numbness if the cord is compressed
Causes & Risk Factors
- Poor posture (postural kyphosis) — the most common and correctable form
- Scheuermann's kyphosis — a developmental condition where the front of vertebrae grow less than the back during adolescence
- Osteoporosis — vertebral compression fractures cause vertebrae to collapse anteriorly, producing a wedge shape
- Congenital kyphosis — vertebrae form abnormally during fetal development
- Degenerative disc disease — disc height loss causes forward collapse of the upper spine
- Inflammatory conditions such as ankylosing spondylitis
- Neuromuscular conditions (cerebral palsy, muscular dystrophy)
Imaging Findings
Imaging studies are commonly used to identify findings associated with this condition. Results vary by individual; a qualified spine specialist interprets findings in the context of a full clinical evaluation.
MRI
- MRI is used when neurological symptoms are present or when cord compression or spinal canal compromise is suspected from severe kyphotic deformity
- In Scheuermann kyphosis, MRI may show Schmorl nodes (disc herniation into the vertebral endplate), disc degeneration, and vertebral endplate irregularities that confirm the diagnosis
- MRI of the full spine is obtained prior to deformity correction surgery to evaluate the cord and rule out associated intraspinal anomalies; results vary by individual and require specialist interpretation
CT Scan
- CT with 3D reconstruction provides detailed vertebral anatomy for surgical planning: pedicle dimensions, bone quality, and deformity geometry for osteotomy planning
- CT evaluates for fracture (particularly in osteoporotic kyphosis) and assesses bone density via CT-based HU values — Hounsfield unit measurements correlate with vertebral fracture risk
- Not typically used for initial diagnosis or routine monitoring; reserved for surgical planning or when fracture is suspected
X-Ray
- Full-length standing lateral radiograph is the primary tool: Cobb angle between the upper and lower end vertebrae quantifies kyphosis; angles >45 degrees thoracic (Scheuermann) or >50 degrees (adult) are generally considered abnormal
- Three or more consecutive vertebrae wedged 5 degrees or more defines Scheuermann kyphosis radiographically; Schmorl nodes and endplate irregularities may also be present
- Sagittal balance (C7 plumb line relative to S1) and spinopelvic parameters (pelvic incidence, sacral slope, pelvic tilt) guide surgical planning for kyphotic deformity correction
Who Is Commonly Affected
The following patterns are commonly associated with this condition based on published population studies. Individual presentation varies; these figures are informational only.
Peak Age Range
Scheuermann kyphosis: adolescents aged 12-17 during the growth spurt; postural kyphosis: adolescents and young adults; senile/degenerative kyphosis: adults over 60, worsening with each decade
Gender Distribution
Scheuermann kyphosis is more common in males (approximately 2:1 male-to-female ratio); postural kyphosis has roughly equal sex distribution; degenerative and osteoporotic kyphosis more common in older women
Estimated Prevalence
Postural and mild kyphosis are very common and do not meet criteria for Scheuermann disease; Scheuermann kyphosis affects approximately 1-8% of adolescents; hyperkyphosis (>50 degrees) in adults over 60 found in 20-40% in population-based imaging studies; based on published population studies, individual presentation varies
Treatment Options
Conservative
- Postural training and physical therapy — the mainstay for postural kyphosis
- Core strengthening and back extension exercises
- Spinal bracing — Milwaukee brace or thoracolumbosacral orthosis (TLSO) for Scheuermann's kyphosis in growing adolescents
- Osteoporosis treatment to prevent further vertebral collapse in elderly patients
- Pain management with NSAIDs or physical modalities
- Breathing exercises to maintain lung function in moderate-to-severe curves
Surgical
- Posterior spinal fusion with instrumentation — corrects the curve by fusing vertebrae into a more upright alignment; the most common procedure for structural kyphosis exceeding 70–75 degrees
- Osteotomy — vertebral bone cuts performed to achieve greater correction in rigid or severe deformities
- Kyphoplasty or vertebroplasty for fracture-related kyphosis (stabilizes the fractures)
When to see a spine specialist
See a spine specialist if your upper back curve is worsening, causing pain that limits daily activities, or if breathing is affected. Adolescents with a rigid curve that does not straighten when lying down should be evaluated for Scheuermann's kyphosis. Adults over 60 with new kyphosis should be screened for osteoporosis and vertebral fractures.
Specialists Who Treat Kyphosis
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Questions to Ask Your Doctor
Bring these questions to your next appointment about kyphosis.
- 1
What type of kyphosis do I have — postural, Scheuermann, degenerative/senile, or another cause — and does that change the treatment approach?
- 2
What is my Cobb angle on a standing lateral radiograph — and at what degree does my kyphosis fall relative to the threshold for observation versus active intervention?
- 3
For Scheuermann kyphosis specifically, is bracing still an option given my age and skeletal maturity — and what is the realistic degree of correction I should expect?
- 4
What exercises or physical therapy approaches have the best evidence for reducing pain and improving function in my type and degree of kyphosis?
- 5
If surgery is being considered, what are the risks given the extensive correction typically required, and what functional and cosmetic improvements are realistic?
Clinical Evidence
Key Research
- L4Scheuermann's kyphosis (2007, Current Opinion in Rheumatology)
- L4Nonsurgical treatment of kyphosis (2004, Current Opinion in Rheumatology)
- L4Scheuermann's disease: current diagnosis and treatment approach (2014)
- L2Long-term efficacy of kyphosis exercise and posture training in older community-dwelling adults (2020)
Frequently Asked Questions
What is the difference between postural kyphosis and Scheuermann's kyphosis?
Postural kyphosis is a flexible rounding — when you lie on your back or consciously straighten up, the curve corrects itself. It is caused by habit and muscle weakness, not structural bone changes. Scheuermann's kyphosis is a rigid, structural deformity — the vertebrae are actually wedge-shaped due to abnormal growth, and the curve does not correct with position changes. X-rays typically show three or more consecutive vertebrae wedged 5 degrees or more in Scheuermann's.
Can kyphosis be corrected with exercise?
Postural kyphosis can be significantly improved with consistent back extension exercises, core strengthening, and postural correction habits. Structural kyphosis — whether from Scheuermann's disease or osteoporotic fractures — cannot be fully corrected with exercise alone. However, physical therapy can reduce pain, prevent worsening, and improve functional capacity even in structural cases. Bracing is most effective when started during the adolescent growth spurt for Scheuermann's kyphosis.
When is surgery recommended for kyphosis?
Surgery is generally recommended when: the curve exceeds 70–75 degrees and is progressing; neurological symptoms develop; the deformity causes intractable pain unresponsive to conservative care; or breathing capacity is significantly reduced. Surgery carries meaningful risks in a complex area of the spine and requires a highly experienced spinal deformity surgeon. A thorough evaluation including CT, MRI, and pulmonary function tests is completed before planning.