What Your MRI Report Actually Means

A patient brought me an MRI report last month with three sentences highlighted in yellow. Multilevel degenerative disc disease. Disc desiccation at L4-L5. Small posterior annular fissure.

She had read it as a description of a spine falling apart. She had stopped lifting her toddler. She had cancelled a hiking trip.

Her back pain was moderate, mechanical, and resolved in seven visits. The MRI findings were, for a 44-year-old, entirely unremarkable.

The study everyone in this field cites

In 2015, Brinjikji and colleagues pooled 33 imaging studies covering more than 3,000 people with no back pain at all. Here is what they found in the asymptomatic:

Age	Disc degeneration	Disc bulge
20	37%	30%
40	68%	50%
60	88%	69%
80	96%	84%

Read that again. Ninety-six percent of pain-free eighty-year-olds have disc degeneration. Half of pain-free forty-year-olds have a disc bulge.

These findings are, to a large extent, what spines look like as they age. They appear on a report because a radiologist is obligated to describe what is there, not because each item is a diagnosis.

Translating the vocabulary

“Degenerative disc disease” — the worst-named finding in medicine. It is not a disease and it is not progressive in the way the word implies. It describes discs that have lost water content and height with age. Everyone gets it.

“Disc desiccation” — the disc has less water in it than a young one. See above.

“Disc bulge” — the disc extends slightly beyond its normal margin, symmetrically. Very common, frequently irrelevant.

“Annular fissure” — a small crack in the outer disc wall. Sometimes painful, often not.

“Facet arthropathy” — arthritic change in the small spinal joints. Near-universal past middle age.

“Disc extrusion” and “nerve root compression” — these are the terms that carry more weight, particularly when they match your symptoms.

The part that matters clinically

An imaging finding is meaningful when it corresponds to your examination.

If your MRI shows an L4-L5 herniation, and your pain runs down the outside of your shin into your big toe, and your foot is weak on that side, and your reflexes fit — the image is explaining something real.

If your MRI shows the same herniation and your pain is across the belt line, worse standing, better sitting, with no leg symptoms and a normal neurological exam — that herniation is probably a bystander. The picture and the patient do not match.

This mismatch is common. It is one of the main reasons clinical guidelines advise against routine early imaging for uncomplicated back pain.

Why the framing genuinely changes outcomes

This is not just about feeling better emotionally. Patients given imaging early for non-specific back pain report more pain and disability at follow-up than those managed without it, and they undergo more procedures without better results.

The mechanism is not mysterious. Someone shown a frightening picture of their spine moves less, guards more, and avoids the activity that would have helped. Fear is biomechanically expensive.

When you should have imaging

Clear cases: red flags — bowel or bladder change, saddle numbness, progressive weakness, fever, unexplained weight loss, significant trauma, a cancer history. Also when there is a progressive neurological deficit, or when conservative care has genuinely failed and the result would change what happens next.

Not clear cases: back pain that started ten days ago and has no red flags. Give it time and active treatment first.

What to do with the report you already have

Bring it in. We will go through it line by line and tell you which findings match your symptoms and which are age-appropriate background noise.

Most people leave that conversation less frightened than they arrived, and that alone tends to be worth a visit.