Kyphoscoliosis

Overview

Kyphoscoliosis is an abnormal curvature of the spine that combines two types of curve: scoliosis, a sideways curving of the spine, and kyphosis, an excessive forward rounding of the upper back. Together these produce a spine that is curved in more than one direction, which can affect posture, balance, and the shape of the chest and back.

Kyphoscoliosis ranges from mild and stable to severe and progressive. Many cases have no identifiable cause, while others result from congenital spine differences, neuromuscular conditions, or syndromes such as neurofibromatosis type 1. In severe cases, the curve can crowd the chest and reduce lung and heart function, so the degree of curvature and whether it is worsening guide how closely it is monitored and treated.

Symptoms

The most obvious sign is a visible change in the shape of the back and posture. Other features depend on the severity.

• An abnormally rounded upper back combined with a sideways curve or tilt
• Uneven shoulders, shoulder blades, or hips
• A visible hump or prominence of the back, especially when bending forward
• Back pain or stiffness
• In severe cases: shortness of breath or reduced exercise tolerance from limited chest expansion

Worsening shortness of breath, new chest discomfort, or new weakness, numbness, or changes in bladder or bowel control should be evaluated promptly, as they may signal pressure on the lungs, heart, or spinal cord.

Causes

Kyphoscoliosis can arise from several different processes.

• Idiopathic: No clear cause, often developing during the growth years.
• Congenital: Spine bones that did not form normally before birth.
• Neuromuscular: Conditions affecting muscles and nerves, such as cerebral palsy or muscular dystrophy, that allow the spine to curve.
• Syndromic: Associated with conditions such as neurofibromatosis type 1 or certain connective tissue disorders.
• Degenerative: Age-related changes and bone weakening (osteoporosis) in adults.

Risk Factors

• A family history of spinal curvature
• Congenital spine abnormalities
• Neuromuscular conditions such as cerebral palsy or muscular dystrophy
• Neurofibromatosis type 1 or connective tissue disorders
• Osteoporosis and aging in adults
• Rapid growth during adolescence, when curves can progress

Diagnosis

Diagnosis combines examination with imaging to measure the curves.

• Physical examination: Including a forward-bending test to reveal asymmetry and prominence of the back.
• X-rays: The main test, used to measure the size of the curves and track changes over time.
• MRI or CT: Sometimes used to assess the spinal cord, nerves, or congenital bone differences.
• Breathing tests: Lung function testing in severe cases to assess the effect on the chest.

Treatment

Treatment depends on the size of the curve, whether it is worsening, the person's age, and the underlying cause.

• Observation: Mild, stable curves are monitored with periodic exams and X-rays, especially during growth.
• Bracing: Used in growing children and teens to help prevent a moderate curve from worsening.
• Physical therapy: Exercises to support posture, strength, and flexibility, and to help manage pain.
• Surgery: Considered for severe or progressive curves, or when breathing or the spinal cord is threatened; spinal fusion straightens and stabilizes the spine.
• Treating the underlying condition: And supporting breathing where the chest is affected.

Management is individualized and often involves spine specialists working with other clinicians.

Prevention

Many forms of kyphoscoliosis cannot be prevented, especially congenital and idiopathic types. Helpful steps include:

• Regular check-ups during childhood and adolescence so curves are detected early
• Maintaining bone health and treating osteoporosis to limit age-related curving
• Following bracing and therapy plans to slow progression
• Managing underlying neuromuscular or genetic conditions with specialist care

When to See a Doctor

See a doctor if you notice a curving or rounding of the back, uneven shoulders or hips, or a back prominence, especially in a growing child. Seek prompt medical care for:

• New or worsening shortness of breath
• New weakness, numbness, or tingling in the legs
• Changes in bladder or bowel control
• Severe or rapidly worsening back pain

Related Topics

Frequently Asked Questions

References

1. American Academy of Orthopaedic Surgeons (AAOS). Scoliosis and Spinal Deformity.
2. MedlinePlus, U.S. National Library of Medicine. Kyphosis.
3. National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS). Scoliosis.
4. Scoliosis Research Society. Kyphosis.