Disc degeneration in 96% of eighty-year-olds without pain. Rotator cuff abnormality in 96% of asymptomatic shoulders. And yet the same findings are still more common in people who hurt. Two papers, same group, same year — and almost nobody cites both.
Someone hands you a report. It says disc degeneration, disc bulge, annular fissure. Perhaps a rotator cuff tear, or a meniscal tear, or a labral tear.
It reads like a verdict. It usually isn’t one.
But the correction that follows — that these findings are meaningless, that scans are pointless, that it’s all just normal ageing — has become almost as unhelpful as the original fear. Both versions are wrong, and the reason is that two things are true at once.
In 2015, Brinjikji and colleagues published a systematic review in American Journal of Neuroradiology pooling 33 studies and 3,110 people who had no back pain at all.
The prevalence of disc degeneration rose from 37% of twenty-year-olds to 96% of eighty-year-olds. Disc bulge went from 30% to 84%. Disc protrusion from 29% to 43%. Annular fissures from 19% to 29%.
The neck is more striking still. Nakashima and colleagues scanned 1,211 volunteers with no neurological symptoms, roughly a hundred per decade per sex. Disc bulging appeared in 87.6% of them, and was already common in people in their twenties.
It is not confined to spines:
That last group is worth pausing on, because it is usually misread. Trained athletes carry more findings, not more tolerance of the same findings. The correct interpretation is not that athletes are unusually resilient. It is that these appearances are part of ordinary adult anatomy.
Here is the part that almost never travels with the first part.
Brinjikji’s group published a second paper in the same journal in the same year. This one was a meta-analysis of 14 studies and 3,097 adults aged 50 and under, comparing people with low back pain against people without.
Disc bulge, disc degeneration, extrusion, protrusion, Modic type 1 changes and spondylolysis were all more prevalent in the people who had pain.
So the same research group, in the same year, in the same journal, established both that these findings are common in people without symptoms and that they are still more common in people with them.
Almost everyone citing this work cites one paper and not the other. Which one they pick tends to reveal what they were arguing for before they started.
Degenerative findings matter considerably less than most people — and many clinicians — assume. They are not a good foundation for most of the treatments sold on the back of them. A bulging disc on a report is close to a normal finding for an adult human.
But they are not nothing. A scan finding is weak evidence of cause, not zero evidence.
That is a less satisfying conclusion than either extreme. It is also the only one the data supports.
The first half of this evidence exists to reduce fear. It should be handed to anyone who has been told their spine is crumbling, or that they have the back of a seventy-year-old, or that they must never lift anything again. That framing does real harm — it teaches people that their body is fragile, and people who believe they are fragile move less, and moving less makes everything worse.
The second half exists to make sure the first half is never used to dismiss anyone.
Because there is a version of this argument that ends with "your scan is normal, so there’s nothing wrong" — and for someone in genuine pain who has finally been taken seriously enough to be scanned, that is devastating. The absence of a structural explanation is not the absence of a problem.
Pain is not proportional to tissue damage. It never was. That cuts both ways: it means a frightening scan need not mean a frightening future, and it means a clean scan does not mean you are imagining anything.
None of the above applies to red flags, and the whole argument collapses if it is used to talk anyone out of getting assessed.
Get seen, promptly, for any of these:
Reassurance about imaging findings is for the very large group of people with ordinary musculoskeletal pain. It is not for anybody in that list.
Ask what the findings mean for you specifically, not in general. The useful question is not "is my disc bulging" but "does this finding explain my symptoms, and does it change what we do?"
Ask whether the finding was expected for your age. Often it was.
Notice whether anything in the report is being used to restrict you. "Never bend again" is not a conclusion that follows from a disc bulge, and long-term avoidance has costs of its own.
And treat what you can currently tolerate as more informative than what the scan shows. Measured capacity — what you can lift, how far you can walk, how long you can stand — tells you more about your trajectory than a static image of tissue that was probably like that before your symptoms started.
Most adults over about thirty have findings on a scan. Most of them have no pain. Some of them do, and their findings are somewhat more common than average.
That means imaging is a poor explanation for symptoms and a legitimate tool for excluding serious disease. It means fear based on a report is usually misplaced. And it means anyone who tells you your scan is meaningless is doing the same thing as the person who told you it was a catastrophe — picking the half of the evidence that suits their argument.
This article is general information and not medical advice. If you have any of the red flag symptoms listed above, seek medical assessment.
Sources
Brinjikji W, et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR American Journal of Neuroradiology 2015;36(4):811–816.
Brinjikji W, et al. MRI findings of disc degeneration are more prevalent in adults with low back pain than in asymptomatic controls: a systematic review and meta-analysis. AJNR American Journal of Neuroradiology 2015;36(12):2394–2399.
Nakashima H, et al. Abnormal findings on magnetic resonance images of the cervical spines in 1,211 asymptomatic subjects. Spine 2015;40(6):392–398.
Ibounig T, et al. Rotator cuff abnormalities in a population-based cohort. JAMA Internal Medicine 2026.
Culvenor AG, et al. Prevalence of knee osteoarthritis features on MRI in asymptomatic uninjured adults: a systematic review and meta-analysis. British Journal of Sports Medicine 2018.
What you can currently tolerate tells you more than a static image. That is measurable.
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