Spine and Vertebral Pathology

Spine and vertebral pathology covers disorders of the vertebral column and its intervertebral discs — degenerative disc disease, spinal stenosis, deformity, and the broad category of low back pain. The spine combines load-bearing, mobility, and protection of the spinal cord, and a recurring theme of its pathology is the weak link between structural imaging findings and a patient's symptoms.

Definition

Spine and vertebral pathology comprises the degenerative, structural, and deformity conditions of the vertebral column and intervertebral discs, alongside the largely non-specific syndrome of low back pain.

Scope

This topic surveys the degenerative and structural conditions of the spine, the high prevalence of imaging abnormalities in people without pain, and the way most low back pain is non-specific and cannot be attributed to a single structural cause. It is a reference-educational overview, not clinical guidance.

Core questions

• What are the main spinal disorders — disc degeneration, stenosis, and deformity?
• How common are abnormal spine imaging findings in people without back pain?
• Why is most low back pain classified as non-specific?
• Why is low back pain such a large contributor to global disability?

Key concepts

• Intervertebral disc degeneration
• Disc herniation
• Spinal stenosis
• Non-specific low back pain
• Spinal deformity
• Structure-symptom discordance

Mechanisms

The vertebral column is a stacked series of vertebrae separated by intervertebral discs, stabilised by ligaments and muscles and enclosing the spinal cord and nerve roots. Age-related disc degeneration, facet joint change, and narrowing of the spinal canal (stenosis) are the typical structural processes, but these findings are extremely common on imaging of people who have no back pain — bulges, degeneration, and other abnormalities appear frequently in asymptomatic adults (Jensen 1994). For this reason, the great majority of low back pain is classified as non-specific, meaning it cannot be reliably attributed to a single identifiable structure or pathology (Maher 2017). Low back pain is shaped by biological, psychological, and social factors rather than structural damage alone (Hartvigsen 2018).

Clinical relevance

Spinal disorders, and low back pain in particular, are among the largest contributors to disability worldwide, and the discordance between imaging and symptoms is central to interpreting their evidence base. Recognising that most back pain is non-specific underpins how the condition is studied and described. This entry explains how spinal conditions are categorised and studied and is not a basis for individual diagnosis or treatment decisions.

Epidemiology

Low back pain is one of the leading causes of years lived with disability globally, affecting people across all regions and age groups (Hartvigsen 2018). Degenerative imaging findings rise with age and are common in asymptomatic populations, so structural prevalence and symptomatic prevalence diverge markedly (Jensen 1994).

History

The spread of magnetic resonance imaging in the late twentieth century allowed detailed visualisation of the spine and revealed how frequently structural abnormalities occur in people without symptoms (Jensen 1994). This evidence, alongside global burden-of-disease work, contributed to the modern framing of most low back pain as a non-specific, multifactorial condition rather than a straightforward structural disease (Hartvigsen 2018; Maher 2017).

Debates

Do spinal imaging findings explain back pain?

Disc bulges, degeneration, and other abnormalities are common on imaging of people without pain, so most low back pain is classified as non-specific and cannot be reliably attributed to a single structural finding.

Seminal works

• jensen-1994
• hartvigsen-2018
• maher-2017

Frequently asked questions

Do disc abnormalities on an MRI explain back pain?

Often not. Disc bulges, degeneration, and other abnormalities are common on spine imaging of people without any back pain, so a finding alone does not establish the cause of symptoms, and most low back pain is classified as non-specific.

Why is low back pain such a major health problem?

Low back pain is one of the leading causes of disability worldwide and is shaped by biological, psychological, and social factors rather than structural damage alone, making it a large and persistent burden across populations.