How to Read Your Spine MRI Report | What "Severe" Really Means
Patient Education · Spine MRI
How to Read Your Spine MRI Report —
What “Severe” Really Means
Your spine MRI came back. The report is full of words like “severe,” “significant,” and “cord impingement.” Your phone is buzzing with a worried message from your primary care doctor. Here is what a neurosurgeon actually thinks when he reads the same report.
I see it in my office almost every week. A patient walks in holding a printout of their spine MRI report, visibly anxious. The radiologist has used words like “severe foraminal stenosis,” “significant disc desiccation,” “moderate to severe central canal narrowing.” Sometimes they have already been told by a well-meaning primary care physician or neurologist that they are at risk for paralysis. By the time they sit down across from me, they are convinced surgery is inevitable — or that catastrophe is imminent.
Most of the time, neither is true.
This post is my attempt to give you the framework I use when I read a spine MRI report: what I look for, what I dismiss, and what genuinely concerns me. My goal is to help you read your own report more clearly, ask better questions, and arrive at whatever decision is right for your situation — not the one the language of the report implies.
The radiologist’s job vs. the surgeon’s job —
when reading a spine MRI
Radiologists are expert image interpreters. They describe what they see. That is their job, and they do it well. But a radiologist — in most cases — has never examined you, does not know your symptoms, and is not making a clinical recommendation when they write a report. They are documenting anatomy.
My job is different. I am looking at that same report and asking: does what the radiologist describes explain what this patient is actually experiencing? Those are two very different questions.
I also read images differently than a radiologist. I have operated on hundreds of spines. I know which findings routinely correlate with symptoms — and which ones do not. And I will be direct with you: I frequently disagree with the clinical implications of language used in radiology reports. Not because the radiologist was wrong about what the image shows, but because the words used to describe anatomy do not always translate cleanly into clinical significance.
When I say I disagree with a radiology report, I mean the weight its language implies — words like “severe” or “significant” — often does not match what I find when I examine the patient. The MRI shows anatomy. I treat people.
“Severe” on a spine MRI report
does not mean you need surgery
This is the most important thing I want you to take from this post. The word “severe” in a radiology report describes the degree of an anatomical finding. It does not describe your clinical situation, your prognosis, or what treatment you need.
The research on this has been consistent for decades. In a landmark 1994 study published in the New England Journal of Medicine, Jensen and colleagues performed lumbar MRIs on 98 people with no back pain whatsoever. Fifty-two percent had a disc bulge at at least one level. Twenty-seven percent had a disc protrusion. These were entirely pain-free people. The study concluded that discovering bulges or protrusions in people with low back pain is frequently coincidental.
Jensen MC et al. Magnetic resonance imaging of the lumbar spine in people without back pain. N Engl J Med. 1994;331(2):69–73. PMID: 8208267. doi:10.1056/NEJM199407143310201
Similarly, Boden and colleagues found in 1990 that 19% of asymptomatic cervical spine MRI scans showed abnormalities — including disc herniations and foraminal stenosis — in people with zero neck symptoms. Among those over 40, the rate was 28%.
Boden SD et al. Abnormal magnetic-resonance scans of the cervical spine in asymptomatic subjects. J Bone Joint Surg Am. 1990;72(8):1178–84. PMID: 2398088.
Here is what this means for you: a spine MRI finding — even a severe one — is only clinically relevant if it explains what you are actually experiencing. We do not treat MRI reports. We treat patients.
Severe foraminal stenosis without radiculopathy — often clinically silent
The foramen is the opening through which a nerve root exits the spine. Severe foraminal narrowing means that opening is significantly reduced. It sounds alarming. But if you have no arm pain, no hand numbness, no leg pain, no weakness — no radiculopathy matching that level and side — that nerve is not being functionally compressed in a clinically meaningful way. The finding is real. Its significance for you, right now, may be zero.
The side matters as much as the severity. If the report describes left-sided foraminal stenosis and your only symptoms are on the right, that finding almost certainly does not explain your problem. Always check whether the side and level of the radiologic finding matches your actual symptoms.
Severe degenerative disc disease without back pain — normal aging
I have 80-year-old patients who come in for an unrelated reason, we order an MRI, and the report reads like the spine is falling apart — “severe multilevel DDD,” “significant disc height loss,” “extensive endplate changes.” They play golf three times a week and their back feels fine. The spine ages. That is normal. Most of what that report describes is biology, not pathology requiring treatment.
Degenerative disc disease is nearly universal past a certain age. Over 90% of people over 50 show disc degeneration on MRI — the majority without disabling symptoms. The degenerative changes on your MRI may be decades old and entirely stable.
Severe foraminal stenosis — if you have no arm or leg pain, numbness, or weakness at that exact level and side
Severe degenerative disc disease — if you have no significant functional back or neck pain
Multilevel disc bulges — extremely common after age 40; most are incidental findings
Facet arthropathy / facet hypertrophy — nearly universal in older adults; correlates poorly with pain in isolation
Straightening of lordosis — usually reflects muscle spasm or positioning during the scan, not a structural abnormality
Disc desiccation — the disc drying out with age is normal biology
Schmorl’s nodes — almost always incidental; rarely symptomatic
“Mild to moderate” anything — in the absence of matching symptoms, almost never requires intervention
Common spine MRI terms
explained in plain language
When you receive your spine MRI report, it will describe each disc level individually. Here is a plain-language guide to the terms you will encounter most often — and a realistic sense of their clinical weight.
| Finding in report | Plain language meaning | Clinical weight |
|---|---|---|
| Disc desiccation | Disc losing water content with age. Begins in many people in their 30s. | Normal aging |
| Disc bulge (diffuse / broad-based) | Disc pushing outward symmetrically beyond its borders. Present in over half of asymptomatic adults. | Often incidental |
| Disc protrusion / herniation | Disc material has pushed through the outer wall focally. More likely symptomatic than a bulge, but still frequently incidental. | Context-dependent |
| Disc extrusion | A larger herniation where disc material has escaped the disc space more significantly. | More likely symptomatic |
| Foraminal stenosis (mild / moderate / severe) | Narrowing of the channel through which a nerve exits. Only relevant if nerve symptoms match the level and side. | Symptom-dependent |
| Central canal stenosis | Narrowing of the main spinal canal. Significance depends entirely on degree and whether symptoms are present. | Degree + symptoms |
| Nerve root “contact” vs. “compression” | Contact means touching; compression means deforming. These are meaningfully different. Reports often use them interchangeably. I do not. | Compression > contact |
| Straightening of lordosis | Loss of the normal cervical or lumbar curve during the scan. Usually positional or due to muscle spasm — not a structural diagnosis. | Usually positional |
| Cord signal change / T2 hyperintensity | Abnormal signal within the spinal cord itself on MRI — indicates the cord is under stress or being injured. | Warrants evaluation |
| Cord edema / myelomalacia | Swelling within cord tissue (edema) or chronic cord damage (myelomalacia). Suggests active or prior cord injury. | Requires attention |
| Spondylolisthesis (Grade I–IV) | One vertebra has slipped forward over the one below it. Grade and stability matter. | Grade + stability matter |
| Modic changes (endplate changes) | Changes in the bone next to the disc. Type 1 (active) may correlate with back pain. Types 2 and 3 less so. | Type 1 most relevant |
| Facet arthropathy / hypertrophy | Degenerative changes of the facet joints. Common in older adults; correlates inconsistently with pain. | Often incidental |
Two specific phrases deserve extra attention. “Straightening of the normal cervical lordosis” causes significant patient anxiety. In the vast majority of cases it simply means your muscles tensed up during the scan — a reflexive response to pain or anxiety — and the normal curve temporarily flattened. It is not a structural deformity and is almost never a surgical indication on its own.
The distinction between nerve root “contact” and nerve root “compression” is also frequently lost in casual report language. A disc touching a nerve root is not the same as a disc deforming and compressing it. The former may produce no symptoms at all. When I read a report, I look at the actual images to make this determination myself — not just the written summary.
Spine MRI findings that
genuinely require attention
Not all spine MRI findings are equal. There are findings that change how I manage a patient — sometimes urgently. Here is what I am actually looking for:
Severe central canal stenosis with cord compression AND cord signal change or cord edema. If the spinal cord itself is showing T2 signal abnormality — meaning it is being injured, not just compressed — that is a different conversation from stenosis alone. This pattern is consistent with myelopathy. Progressive hand weakness, balance problems, gait instability, and difficulty with fine motor tasks alongside these MRI findings warrants prompt evaluation.
True cauda equina syndrome — the clinical syndrome, not just the radiologic description. Acute onset saddle anesthesia (numbness in the groin and inner thighs), new urinary retention or frank incontinence, and rapidly progressive bilateral leg weakness is a surgical emergency. A radiology report describing a “crowded cauda equina” or “severe central stenosis” in a walking, continent patient with stable symptoms is not the same thing.
Progressive neurological deficit. If your weakness or coordination problems are objectively worsening week over week, the imaging takes on urgency regardless of specific language in the report.
Spinal infection, tumor, or unstable fracture. Infection can take several forms — epidural abscess, discitis, or osteomyelitis — and each is a different radiologic and clinical presentation, but all demand urgent evaluation. Cases where the clinical picture and imaging align in this way are rarely ambiguous in context.
“Impending paralysis” —
a neurosurgeon’s honest perspective
I need to address this directly, because I hear it from patients regularly — and it causes significant, often unwarranted distress.
Patients come to me after being told by their primary care physician, or sometimes a neurologist, that they have “impending paralysis” because of severe cervical stenosis, or “impending cauda equina syndrome” because of severe lumbar central stenosis. They are frightened. Some have already been pushed toward surgery on the basis of this language alone.
Here is my honest clinical perspective: for the vast majority of patients with severe central stenosis who have stable symptoms, the risk of an acute catastrophic neurological event is low. Yes, these events can occur. I am not dismissing the theoretical possibility. But the risk of sudden paralysis from chronic, stable stenosis — in a patient who is ambulatory, continent, and whose symptoms have not changed in months — is genuinely uncommon. Clinical decisions should be based on probability, not theoretical possibility.
Think of it this way. People occasionally get struck by lightning. That risk is real. But we do not refuse to go outside because of it. We assess the actual likelihood given the conditions, and act accordingly. Severe stenosis on an MRI report, in a patient walking into my office without new symptoms, is not grounds for urgent surgery.
The “impending paralysis” framing comes from two very different places, neither of which straightforwardly serves your interests.
The first is medicolegal protection. A non-surgical physician who sees severe stenosis on your MRI and takes no action is potentially exposed if something bad later occurs. Referring urgently to a surgeon and documenting alarming language protects them. It is a documentation and referral reflex — not a careful individual assessment of your actual risk profile. I understand why physicians do this, but you deserve to understand what is driving it.
The second is that some surgeons use fear to influence surgical consent. A patient who believes they are at imminent risk of paralysis is far more likely to consent to an operation than one who understands the actual probability of their situation. I find this approach ethically problematic. My job is to give you accurate information so you can make the decision that is right for you — not to frighten you into one.
None of this means significant findings should be ignored or urgent symptoms dismissed. It means you deserve an honest conversation about what your specific MRI actually indicates for you — not a reflexive warning designed for someone else’s protection.
Why spine MRI findings
must match your symptoms
The foundational principle of spine surgery is near-absolute among experienced spine surgeons: imaging findings must correlate with symptoms before they justify intervention.
The research supports this consistently. The Jensen and Boden studies cited above are among dozens demonstrating high rates of significant MRI abnormalities in completely asymptomatic individuals. Operating on a finding that does not explain your symptoms is not treatment — it is surgery without a clear target.
This is why I ask detailed questions about exactly where your pain is, which side your symptoms are on, what makes them better or worse, and how your function has changed over time. I am trying to determine whether your clinical story matches the picture I am looking at. When they match — when the level, side, and nature of your symptoms align with a specific imaging finding — that finding becomes clinically meaningful. When they do not match, the finding may be real and still be entirely irrelevant to your problem.
What to actually do
with your spine MRI report
Bring the images, not just the written report — the summary is not the study
The written radiology report is a summary. The actual images contain far more information. When you see a spine specialist, bring the disc or digital files with the images themselves. A neurosurgeon who reviews your MRI images directly — rather than relying solely on a written summary — will give you a more nuanced and accurate assessment.
Check side and level against your actual symptoms — the mismatch matters
Before your appointment, compare the findings in the report to where your symptoms actually are. If your symptoms are on the right and the report describes left-sided pathology, raise that discrepancy explicitly. If your pain is in your low back but the report focuses on cervical findings, ask why. These mismatches are clinically important.
Ask whether the finding explains your specific symptoms — the right question
The most useful question you can ask any spine physician is: “Does this finding explain my specific symptoms?” Not “is this finding serious?” — but “does it explain what I am actually experiencing?” Those are different questions and lead to very different conversations.
Understand “normal for age” — most spines look worse than they feel
Many findings that sound alarming at 45 would look identical in a completely asymptomatic person 20 years older. Disc degeneration, facet changes, and disc height loss are part of normal spinal aging. The question is not whether these changes exist — they almost certainly do past a certain age — but whether they are causing your specific problem.
Consider a second opinion before major surgery — always reasonable
If you have been told surgery is urgent based primarily on MRI findings — especially if your neurological symptoms are stable and you have not had a thorough clinical examination by a spine specialist — a second opinion is always reasonable. An MRI report alone is not an adequate basis for a major surgical decision.
The bottom line
“Severe” on a spine MRI report is a description of anatomy. It is not a diagnosis, a prognosis, or a treatment plan. The most important question is always whether the imaging findings explain and match your symptoms — and whether those symptoms are affecting your life in a way that justifies the risks of intervention.
Most of the time, in my clinical experience, the answer is: take a breath. The report looks worse than you actually are. What matters is what you are experiencing, how it has changed, and what you want your life to look like. Then we can look at the images together and determine whether what I see matches what you have told me — and what, if anything, we should do about it.
That honest conversation is always worth having with a surgeon who will tell you the truth on both sides: when something is genuinely concerning, and when it is not.
or want a second opinion?
Upload your spine MRI before the consultation. Dr. Katsevman reviews all imaging personally and gives you a frank, honest assessment of what the findings actually mean for your specific situation — including whether any intervention is warranted at all. Offices in Naples and Fort Myers. Telemedicine available nationwide.
Request a ConsultationReferences
- Jensen MC, Brant-Zawadzki MN, Obuchowski N, et al. Magnetic resonance imaging of the lumbar spine in people without back pain. N Engl J Med. 1994;331(2):69–73. PMID: 8208267. doi:10.1056/NEJM199407143310201
- Boden SD, McCowin PR, Davis DO, et al. Abnormal magnetic-resonance scans of the cervical spine in asymptomatic subjects. J Bone Joint Surg Am. 1990;72(8):1178–84. PMID: 2398088.
