Vertebral compression fracture

A vertebral compression fracture occurs when a vertebra collapses under compressive force that exceeds its structural strength. Rather than breaking like a long bone, the vertebra crumples inward, losing height on its anterior aspect and creating a characteristic wedge shape on imaging. Multiple compression fractures cause progressive loss of spinal height and increasing forward curvature of the thoracic spine, the condition known as kyphosis or, in severe cases, a dowager's hump.

Vertebral compression fractures are classified by cause:

• Osteoporotic compression fractures are by far the most common type, occurring when bone density has fallen to a level where normal daily loading is sufficient to cause vertebral collapse. They most commonly affect the thoracic and thoracolumbar junction, particularly T12 and L1.

• Traumatic compression fractures occur from significant external force in people with normal bone density, such as a fall from height, road traffic accident, or sporting injury.

• Pathological compression fractures occur when vertebral bone is weakened by an underlying disease process including bone metastases, multiple myeloma, or primary bone tumours. Distinguishing pathological from osteoporotic fractures is one of the most important clinical questions and is answered by MRI.

Vertebral compression fracture symptoms vary significantly depending on whether the fracture is acute or chronic, and whether it was clinically apparent at the time of occurrence.

Acute fracture:

• Sudden onset of sharp, localised back pain, often at a specific vertebral level

• Pain that is significantly worse with standing, walking, and any spinal loading

• Relief only with lying flat and complete spinal unloading

• Point tenderness directly over the affected vertebra

• Reduced spinal mobility from pain

Chronic or silent fracture:

• Persistent dull background back pain that may have been attributed to general degeneration

• Progressive loss of height, often noticed by the person or their family over years

• Increasing thoracic kyphosis and postural change

• Reduced lung capacity from severe thoracic kyphosis in advanced cases

• No memory of a specific painful event

Many osteoporotic compression fractures cause no acute pain and are discovered incidentally on imaging, reflecting the insidious nature of bone density loss.

The underlying cause in the vast majority of cases is osteoporosis, with other conditions playing a smaller but important role. Contributing causes include:

• Osteoporosis: the primary cause. Reduced bone mineral density allows vertebrae to fracture under loads that a healthy skeleton would tolerate without difficulty. The trabecular bone of vertebral bodies is particularly sensitive to density loss.

• Age and female sex: bone density naturally declines with age. Women lose bone density rapidly in the years following menopause from oestrogen withdrawal, placing postmenopausal women at significantly elevated risk.

• Corticosteroid use: long-term corticosteroid medication is one of the strongest secondary causes of bone density loss and vertebral fracture risk.

• Vitamin D and calcium deficiency: impairs bone mineralisation and accelerates density loss.

• Malignancy: bone metastases from breast, prostate, lung, kidney, and thyroid cancer, and multiple myeloma, weaken vertebral bone from within, causing pathological fractures that can occur with minimal force.

• Immobility: reduces the mechanical loading that stimulates bone formation, accelerating density loss.

• Smoking and alcohol excess: both impair bone metabolism and accelerate density loss.

• Genetic predisposition: family history of osteoporosis and fracture significantly raises individual risk.

Detection combines spinal MRI, which directly visualises the fracture and identifies its cause, with blood tests that assess bone metabolism and screen for underlying conditions weakening vertebral bone.

Spinal MRI Elfcare’s full-body MRI covers the thoracic and lumbar spine, directly identifying vertebral compression fractures and measuring height loss. Crucially, MRI signal characteristics allow clinicians to distinguish between a standard osteoporotic fracture and a pathological fracture caused by a tumor, a distinction that fundamentally changes the required treatment. The scan also detects "retropulsion," where bone fragments are pushed back into the spinal canal, posing a risk of nerve compression.

Blood tests cannot detect vertebral fractures directly but are essential for assessing bone metabolism and identifying conditions weakening vertebral bone. Relevant markers in Elfcare's panel include:

• Vitamin D, calcium, phosphate and magnesium: assess the minerals required for bone strength and mineralization.

• ALP: high levels can indicate active bone remodeling, Paget's disease, or bone metastases.

• TSH: screens for hyperthyroidism, which accelerates bone loss.

• Testosterone and estradiol: deficiencies in these are major drivers of reduced bone density in both men and women.

• PSA (men): screens for prostate cancer, which frequently spreads to the spine.

• Hemoglobin and total protein: screens for multiple myeloma, a condition that destroys bone and causes anemia.

• CRP: Identifies systemic inflammation that can lead to secondary osteoporosis.

Why early detection matters

A vertebral compression fracture is not an isolated event. It is a signal that bone density has fallen to a level where the next fracture, including a hip fracture, is a real and imminent risk. The year following a vertebral compression fracture carries a five-fold increased risk of further vertebral fractures and a significantly elevated risk of hip fracture, the most dangerous osteoporotic fracture with a one-year mortality approaching 25% in older adults. Identifying a compression fracture early, correcting vitamin D and calcium deficiency, initiating bone-strengthening medication such as bisphosphonates or denosumab, and excluding pathological causes from malignancy, dramatically reduces the risk of the next fracture and the cascade of disability and mortality it can cause.

How Elfcare can help

Elfcare's full body MRI covers the thoracic and lumbar spine as standard, identifying vertebral compression fractures, assessing their severity, and distinguishing osteoporotic from pathological causes through characteristic MRI signal patterns. This distinction is the most clinically important question in vertebral fracture assessment and is answered definitively by MRI rather than X-ray.

Our blood panel covers vitamin D, calcium, ALP, phosphate, thyroid function, sex hormones, CRP, and relevant tumour markers, providing a comprehensive assessment of bone metabolism and the conditions most commonly driving vertebral fragility.

If our MRI or blood tests identify a vertebral compression fracture or significant bone health concern, we take care of further diagnostics or refer you to the appropriate specialist.