How should you read a lumbar MRI report?

A radiologist describes what is visible on the images in front of them. They do it thoroughly, without knowing your symptoms, your exam or your working life. That is the correct professional standard. It produces a complete inventory of everything present, normal for age or otherwise.

The inventory then reaches you as a list of alarming nouns. Degeneration. Desiccation. Bulging. Narrowing. Arthropathy. None of those words was chosen to describe your pain, because your pain was not in the room. One step has usually been skipped. In that step a clinician reads the inventory against a physical exam. Then they decide which line, if any, matches what you feel.

What are typical findings on a lumbar MRI?

• Disc desiccation — present in most adults past their thirties.
• Disc bulge — common and largely age-related. It shows up more often decade by decade in people with no symptoms.
• Facet arthropathy (changes in the facet joints) — found in nearly everyone in later decades. And, importantly, it is not the way facet pain is diagnosed. That requires a block.
• Mild foraminal or canal narrowing — only meaningful if it matches a symptom pattern and an exam.
• Schmorl’s nodes, endplate changes, mild scoliosis — usually incidental (found by chance and not the cause).
• Annular fissure (a crack in the disc’s outer ring) — sometimes a real pain source, often not, and long over-read.

This is the central finding of decades of imaging research, and it is not controversial. Degenerative features on lumbar imaging are extremely common in people who have never had back pain. They become more common with every decade. So finding them in you establishes almost nothing on its own.

Which lumbar MRI findings actually matter?

• A disc extrusion or sequestration that matches the symptomatic level and the examination.
• Compression of a nerve root on the side and at the level that match a real neurological deficit.
• Severe central canal stenosis in someone with the matching walking pattern, limited by distance. Stenosis.
• Spondylolisthesis with demonstrable instability on flexion and extension views.
• Infection, fracture, or a lesion suspicious for malignancy — uncommon, and the reason imaging exists at all when a red flag is present.
• Inflammatory sacroiliitis, which points away from mechanical pain and toward rheumatology.

Notice the word that keeps coming back. Matches. A finding earns its significance by matching the person. Nothing else on the report does.

The two errors that follow a scan

What can a lumbar MRI not show?

It cannot see facet-mediated pain or sacroiliac pain. It cannot see muscular and myofascial pain generators (pain from muscle and the tissue wrapping it). It cannot see central sensitization (a nervous system turned up too high) or the metabolic state of the tissue it is picturing. Between them those account for a very large share of persistent low back pain. That is why a workup that begins and ends with imaging misses most of the field.

It also cannot see load. A disc photographed lying flat in a magnet is not the disc that fails at the end of a shift. The whole clinical problem is behavior under load. That gap is not a flaw in the technology. It is a limit of what a still image of an unloaded spine can hold.

Why the terrain does not appear on the report either

The tissue in those images is kept up by a metabolic system. Its state decides both why the structure degenerated and how it will respond to anything we do. Chronic hyperinsulinemia (long-term high insulin) glycates and cross-links collagen. So the annulus and the facet capsule are stiffer and more prone to cracking. Systemic inflammation holds the tissue in a degradative (breaking-down) state, so ordinary microdamage does not clear. Endplate microvascular disease (damage to tiny vessels) blocks the diffusion route that feeds the disc.

None of that is visible, and all of it is measurable in blood. That is the reason a back consultation here includes bloodwork alongside the imaging review. It is not to sell a metabolic program. It is because a structural plan built on an inflamed terrain underperforms. It is better to know that before rather than after.

And there is a plain economic layer under it. The population that arrives with the worst imaging is, out of proportion, the population working the schedules and eating the food that produce the terrain. That is a fact about a food and labor system, not about individual discipline. Treating the level and lecturing the patient is the wrong response to both halves.

Frequently asked questions

My MRI was normal. Does that mean it is in my head?

No, and that inference is one of the more damaging things done in this field. It means the cause is not one that MRI images. Facet joints, the sacroiliac joint and sensitization are all invisible on it, and all common.

Should I get a new scan?

Usually not, unless something has changed neurologically or a red flag has appeared. Repeating a scan rarely changes management. It reliably finds another incidental abnormality to worry about. Re-scanning a known pattern finds the same changes it found last time.

My scan looks terrible. Am I heading for a wheelchair?

Almost certainly not. The link between how degenerate a lumbar spine looks and how a person functions is weak. Plenty of people with frightening reports walk, work and lift without difficulty. Function is the outcome that matters, and it is easier to change than the pictures.

For what disc degeneration does and does not mean, read degenerative disc disease.

What should I bring?

The actual images if you have them, not only the report — a disc on file or a portal login. Reading the images against an exam is the step that has usually been missed. It needs the images. What happens at the first visit.

Does a lumbar MRI show sciatica?

It can show the cause, but only a match makes it count. An MRI can show a disc extrusion or a nerve root being pressed on. That finding matters when it sits on the same side and at the same level as your symptoms. Your exam must also show a matching nerve problem. A bulge on the report that does not match your leg symptoms establishes very little on its own.

Is a disc bulge or disc desiccation on my MRI serious?

Usually not. Disc desiccation, meaning a disc that has dried out, shows up in most adults past their thirties. Disc bulges are common too. They become more common every decade in people with no symptoms at all. These are mostly signs of age. They only earn weight when they match your symptoms and your exam. The report alone cannot tell you that.

Can a lumbar MRI show cancer or infection?

Yes. Infection, a fracture, or a lesion that looks suspicious for cancer can all show up on a lumbar MRI. These findings are uncommon. They are the main reason imaging exists at all when a red flag is present. Without a red flag, a scan is far more likely to turn up ordinary age changes. Those sound alarming on paper and mean little.

Related reading

• Lumbar facet syndrome
• Is it actually the disc?
• The diagnostic block, explained
• When back pain is an emergency
• Back pain doctor in St. Louis

Early imaging does not improve outcomes, and it reliably produces a culprit.