Treatment decision6 min read
What 'degeneration' means in a lumbar MRI report
Lumbar MRI reports are the documents that worry patients most. Once the technical language is understood, a report can be judged on the right scale and unnecessary anxiety disappears.
Common phrases
'Disc degeneration' and 'reduced disc height' describe normal age-related change. They are normal over thirty and require no treatment on their own.
'Protrusion' means the disc bulges slightly while the outer ring stays intact. It is very common and frequently seen in people without pain.
'Modic changes' describe bone marrow change in the vertebral body. They have been associated with pain in some patients, but that association is inconsistent.
Which phrases are meaningful
'Nerve root compression' or 'foraminal narrowing' are meaningful when accompanied by symptoms radiating into the leg, and must be confirmed on examination.
'Extrusion' and 'sequestered fragment' are more marked findings. Even so, they affect the treatment decision only when they match symptoms and examination.
Terms such as 'mass', 'lesion' or 'bone marrow oedema' suggest a picture other than degeneration and always require medical review.
When imaging is needed
In mechanical back pain without neurological signs lasting less than six weeks, imaging is usually unnecessary and does not change treatment.
It becomes meaningful with numbness below the knee, objective weakness, or a picture not improving despite appropriate treatment.
With changes in bladder or bowel control, weakness in both legs, fever, unexplained weight loss or a history of cancer, the imaging decision is taken without delay.
Key points
- 'Disc degeneration' is normal over the age of thirty.
- Protrusion is very common and seen in pain-free people too.
- Nerve root compression is meaningful with leg symptoms.
- Terms like mass and lesion require medical review.
- Without neurological signs, imaging does not change treatment.
Frequently asked questions
My report looks bad but my pain is mild — is that normal?
It is normal and common. There is no reliable relationship between imaging findings and pain severity. A finding producing no symptoms requires no treatment.
Should I repeat the MRI?
Without a marked change in symptoms, repeating is unnecessary and does not change treatment. With new weakness or neurological signs it is reconsidered.
How many levels of degeneration counts as serious?
The number of levels does not indicate severity. Degenerative findings at several levels are expected over fifty; symptoms and function are what matter.
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This content is for information only and does not replace medical diagnosis or treatment. Response to treatment varies between individuals. Please consult a healthcare professional about your symptoms.