What does “Disc protrusion” mean on a radiology report?
Part of a spinal disc pushes out beyond its normal edge in one focal area — a type of disc herniation, and a common finding on spine MRI.
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General explanations of common wording, not advice about your own scan. Ask the doctor who ordered it what your results mean for you.
Why the radiologist wrote it that way
In standard spine terminology, herniations are split by shape. A "protrusion" is a focal herniation whose base, where it joins the disc, is wider than the distance it sticks out. An "extrusion" is one where the escaped material is wider than its base or has pushed further. The radiologist will usually add where it points — central, paracentral, foraminal — and whether it touches or compresses a nerve root, because location matters more than the label.
Is this good or bad news?
Protrusions, like bulges, are found in many people who have no symptoms. The parts of the report that carry weight are whether the protrusion contacts or displaces a nerve root, and whether it narrows the spinal canal or the foramen a nerve leaves through. Those details are what your doctor lines up against the pattern of any pain, numbness or weakness you have. Most people with symptoms from a disc herniation improve without surgery over a period of weeks to months, though this is general information and your own doctor will advise on your situation.
What it does not mean
- That the disc has "slipped" out of place. Discs do not slide out; part of the material pushes outward.
- That it is worse than a bulge in every case. What it touches matters more than the word.
- That it will need an operation.
Where you will see it
Words in this phrase
- HerniationWhen an organ or tissue pushes through an abnormal opening. Common in spinal discs.
- ExtrusionWhen disc material pushes completely through the outer disc wall (type of herniation).
- RadiculopathyNerve root pain, numbness, or weakness, often from disc herniation or spinal stenosis.
- ForamenAn opening or hole through which nerves or blood vessels pass.
- StenosisNarrowing of a passage or opening.
One phrase is not the whole report
What this sentence means for you depends on everything else your report says. Radily reads the whole thing and explains it in plain English — and can talk you through it on video, so you are not reading medical language alone.
Other phrases on your report
- Cannot be excludedThe images are not able to completely rule this out — which is a statement about the limits of the scan, not a suggestion that it is likely.
- NonspecificThe finding is real, but its appearance is not distinctive enough to say what is causing it.
- Small pleural effusionA small amount of fluid has collected in the space between the lung and the chest wall.
- Hepatic steatosisFat has built up in the liver — commonly called fatty liver.
This explains how a phrase is commonly used in radiology reports. It is not a diagnosis, not a reading of your scan, and not medical advice. Only your doctor can tell you what your own report means.