What Does My MRI Report Mean?
Receiving an MRI report can be confronting.
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Terms like:
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disc protrusion
disc extrusion
nerve compression
degeneration
stenosis
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can sound serious and permanent.
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Many patients read their scan and immediately assume the worst.
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The reality is that MRI reports often sound more alarming than the condition actually is.
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This page explains what common MRI terms mean in plain English and what actually matters clinically.
First: What an MRI Actually Shows
An MRI shows structure.
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It does not show:
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• pain levels
• inflammation intensity
• nerve sensitivity
• functional capacity
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Two people can have identical MRI findings and completely different symptoms.
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The scan must always be interpreted alongside the clinical picture.
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Common MRI Terms Explained
Disc Bulge
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A disc bulge means the disc is extending slightly beyond its normal boundary.
This is extremely common.
Many people with no back pain at all have disc bulges.
A bulge does not automatically mean nerve damage.
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Disc Protrusion
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A protrusion is a more focal bulge.
Part of the disc pushes outward more in one direction.
It may or may not contact a nerve.
Contact does not automatically mean compression.
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Disc Extrusion
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An disc extrusion means the inner disc material has pushed through the outer fibres.
These often look dramatic on MRI.
However, many extrusions shrink over time as the body reabsorbs the material.
Can a Large Disc Herniation Heal?
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Disc Sequestration
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This is when a fragment of disc material has separated from the main disc.
While this sounds severe, sequestrations often have high rates of natural shrinkage. These patients do normally need to have a specialist consult.
Nerve Root Contact vs Compression
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Reports often say:
Contact does not automatically mean compression.
True compression usually correlates with:
• weakness
• reflex changes
• progressive neurological signs
Pain alone does not confirm dangerous compression.
Degenerative Disc Disease
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This term sounds worse than it is.
Degeneration simply means age-related change.
Like wrinkles on skin.
It does not automatically mean the spine is unstable or failing.
Most adults over 30 show some level of degeneration on MRI.
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Annular Tear
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This refers to a small split in the outer disc fibres.
These can be painful but are common.
They often settle over time.
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Facet Joint Arthropathy
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This means mild arthritic change in the small joints at the back of the spine.
Common with ageing.
Often incidental.
Foraminal Narrowing
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This means the exit space for the nerve is smaller than average.
Mild narrowing is common and often asymptomatic.
Severity and symptoms must correlate.
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Central Canal Stenosis
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Stenosis means narrowing.
Mild stenosis is common and often not dangerous.
Severe stenosis with walking limitation or progressive weakness requires proper assessment.
Why MRI Reports Sound So Serious
Radiologists are trained to describe everything they see.
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They must report all structural findings.
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This often results in:
• long lists of abnormalities
• multiple levels mentioned
• detailed measurements
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However, not every abnormality is clinically significant.
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Many findings are incidental.
What Actually Matters
The most important questions are:
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Is the nerve functioning?
Is strength preserved?
Are symptoms stable or worsening?
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A dramatic MRI with stable neurological findings is usually managed conservatively.
A mild MRI with progressive weakness is more concerning.
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Why Different Doctors Give Different Opinions
Because:
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• some focus on imaging
• some focus on symptoms
• some focus on neurological testing
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The best assessment combines all three.
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An MRI alone should not determine surgery.
Large Does Not Always Mean Severe
Disc size on MRI does not directly predict outcome.
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Some large herniations resolve.
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Some small protrusions cause severe pain.
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The relationship between image and symptom is not always linear.
The Most Important Thing to Understand
MRI findings are common.
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Many people with no pain have:
• disc bulges
• protrusions
• degeneration
• stenosis
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An MRI must always be interpreted in context.
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The scan is a tool, not a diagnosis by itself.
When an MRI Finding Is Concerning
Imaging becomes more significant when paired with:
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• progressive muscle weakness
• reflex loss
• bowel or bladder changes
• saddle numbness
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These require urgent assessment.
If You Are Unsure
If you already have imaging and are confused by the terminology, a structured Disc & Nerve Assessment evaluates:
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• which findings are relevant
• which findings are incidental
• neurological stability
• appropriate next steps
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You will be clearly advised if conservative care is appropriate or if specialist referral is necessary.