What causes kyphosis in adults

Overview

Kyphosis refers to an excessive outward curvature of the spine, resulting in a rounded upper back. While a certain degree of spinal curvature is normal, excessive rounding can lead to pain, stiffness, and cosmetic concerns. In adults, kyphosis can develop due to a variety of factors, ranging from lifestyle habits to underlying medical conditions. Understanding these causes is crucial for effective prevention and management.

Common Causes of Kyphosis in Adults

1. Poor Posture and Lifestyle Factors

One of the most frequent, and often reversible, causes of kyphosis in adults is prolonged poor posture. This is often referred to as 'postural kyphosis' or 'functional kyphosis.' Spending long hours hunched over a desk, computer, or smartphone can gradually stretch the ligaments and muscles in the back, allowing the spine to curve forward. This type of kyphosis is typically not associated with structural changes in the vertebrae themselves and can often be improved with conscious effort to sit and stand up straight, strengthening core muscles, and stretching tight chest muscles.

2. Osteoporosis and Vertebral Compression Fractures

Osteoporosis is a condition characterized by weakened and brittle bones, making them more susceptible to fractures. In the spine, these fractures are known as vertebral compression fractures. Even minor stress, such as coughing, sneezing, or lifting a light object, can cause one or more vertebrae to collapse, leading to a sudden increase in the spinal curve and the development of kyphosis. This is particularly common in postmenopausal women and older adults. According to the National Osteoporosis Foundation, approximately 54 million Americans aged 50 and older are at risk for osteoporosis and low bone mass.

3. Degenerative Changes in the Spine

As people age, the spine undergoes natural degenerative changes. This can include the breakdown of intervertebral discs (degenerative disc disease) and the development of arthritis in the facet joints of the spine (osteoarthritis). These changes can lead to a loss of disc height and changes in the alignment of the vertebrae, contributing to an increased kyphotic curve over time. Degenerative kyphosis often progresses slowly and may be accompanied by back pain and stiffness.

4. Scheuermann's Disease

Scheuermann's disease is a condition that typically affects adolescents during their growth spurts, causing the vertebrae in the upper or middle back to develop abnormally, becoming wedge-shaped instead of rectangular. While primarily diagnosed in younger individuals, the resulting spinal deformity can persist into adulthood, leading to kyphosis. In some cases, the condition may not be diagnosed until adulthood when symptoms become more pronounced.

5. Congenital Kyphosis

Congenital kyphosis occurs when there are abnormalities in the formation of the vertebrae during fetal development. These birth defects can cause the spine to curve abnormally from birth. While less common than other causes in adults, it can be a significant contributor to kyphosis that requires lifelong management.

6. Other Medical Conditions

Several other medical conditions can lead to or exacerbate kyphosis in adults:

• Spinal Infections: Infections like tuberculosis (Pott's disease) can damage the vertebrae and lead to collapse and kyphosis.
• Spinal Tumors: Tumors, whether primary or metastatic, can weaken the spine and cause vertebral collapse.
• Connective Tissue Disorders: Conditions affecting connective tissues can sometimes impact spinal stability.
• Neuromuscular Disorders: Conditions like muscular dystrophy or cerebral palsy can affect muscle strength and control, leading to postural imbalances and kyphosis.
• Metabolic Disorders: Certain metabolic conditions can affect bone health and spinal structure.

7. Trauma and Spinal Surgery

Significant trauma to the spine, such as from a car accident or fall, can result in fractures or dislocations that lead to kyphosis. Additionally, certain types of spinal surgery, particularly those involving the removal of bone or significant fusion procedures, can sometimes alter the natural curvature of the spine and contribute to kyphosis.

Symptoms Associated with Adult Kyphosis

The symptoms of kyphosis can vary depending on the severity and underlying cause. Common symptoms include:

• A visible rounded appearance of the upper back.
• Back pain and stiffness, which may worsen with prolonged sitting or standing.
• Tenderness along the spine.
• Fatigue.
• In severe cases, difficulty breathing due to pressure on the lungs.

Diagnosis and Treatment

A diagnosis of kyphosis typically involves a physical examination, review of medical history, and imaging tests such as X-rays to assess the degree of curvature and identify any underlying structural abnormalities. Treatment depends on the cause, severity, and symptoms. Options can range from physical therapy, exercise, and posture correction for mild cases to medication for pain or osteoporosis, bracing for adolescents, and in severe cases, spinal surgery.