Radiology reports are written for doctors, not patients — and then patients read them anyway. Every week someone sits in my office worried about a word that sounds far worse than it is. These are the five that confuse people most. They sound alike. They aren't the same.
Spondylosis (spon-dih-LOH-sis)
What it means: general wear-and-tear of the spinal discs and joints with age — discs lose water, joints stiffen, small bone spurs form. It's an umbrella term for degeneration, not one specific injury.
What it doesn't mean: it doesn't mean your spine is crumbling, and by itself it doesn't dictate any treatment. Nearly everyone over fifty has some spondylosis on imaging.
When it matters: when the wear narrows something or pinches something — at which point it usually gets a more specific name, like stenosis or radiculopathy below.
Stenosis (steh-NOH-sis)
What it means: narrowing — of the central spinal canal, or of the small openings (foramina) where nerves exit. Less room for nerves.
What it doesn't mean: it's not a herniated disc. A disc problem is something bulging into the space; stenosis is the space itself getting smaller. Different problem, different implications.
When it matters: when nerves run out of room — leg pain, heaviness, or numbness with standing and walking that eases when you sit (neurogenic claudication), or arm pain and hand numbness in the neck.
Spondylolisthesis (spon-dih-loh-lis-THEE-sis)
What it means: one vertebra slips forward over the one below it. The shift can narrow the canal and pinch nerves.
What it doesn't mean: it's not a "slipped disc" — that phrase usually means a herniated disc. This is a slipped vertebra, a different structure entirely. And a slip alone doesn't automatically mean surgery; stable slips without nerve compression are often simply watched.
When it matters: when the slip is unstable on bending X-rays, or when it compresses nerves and causes leg pain, weakness, or difficulty walking.
Spondylolysis (spon-dih-LOL-ih-sis)
What it means: a stress fracture in the pars — the small bridge of bone at the back of a vertebra. Common in young athletes whose sports involve repeated back extension: gymnasts, linemen, divers.
What it doesn't mean: it's not the slip itself — it's the crack that often causes the slip above. The two words describe two stages of one process, which is exactly why they're confused.
When it matters: it usually causes activity-related back pain in teens and young adults and often heals with rest and bracing. What sometimes needs attention later is the slip it leaves behind.
Scoliosis (skoh-lee-OH-sis)
What it means: an abnormal sideways curve of the spine, shaped like an "S" or a "C" when viewed from behind.
What it doesn't mean: it's not caused by bad posture, heavy backpacks, or sleeping wrong. The common adolescent form is idiopathic — no known cause — and most mild curves never progress.
When it matters: curves are watched during growth, when progression happens. In adults, new or worsening curvature usually comes from asymmetric disc degeneration — a different condition with different treatment logic than teenage scoliosis.
Why these words scare people more than they should
Imaging words describe anatomy, not destiny. A report lists everything the radiologist sees — including the normal wear of a fifty-year-old spine — without telling you which finding, if any, explains your symptoms. That's the crucial step, and it's one imaging can't do alone: the finding has to match the exam. A disc bulge that doesn't line up with your pain is just a picture. I translate reports every day, and the translation I give most often is reassurance: the scariest-sounding word on the page is frequently the least important one.
If your report left you worried, bring it in — I'll translate it and give you a straight answer about what matters and what doesn't.
Watch on YouTube Shorts: 5 Spine Terms Explained
Frequently asked questions
What does spondylosis mean on an MRI report?
Spondylosis is a general term for age-related wear-and-tear of the spinal discs and joints — disc dehydration, stiffening joints, small bone spurs. It is extremely common after age fifty and by itself doesn't dictate treatment; what matters is whether the wear is narrowing or pinching anything.
Is spinal stenosis the same as a herniated disc?
No. A herniated disc is disc material bulging or leaking into the spinal canal; stenosis is the canal or nerve openings themselves narrowing. They can occur together and cause similar nerve symptoms, but they are different structural problems.
What's the difference between spondylolysis and spondylolisthesis?
Spondylolysis is a stress fracture in the small bony bridge (pars) at the back of a vertebra, common in young athletes. Spondylolisthesis is the forward slip of one vertebra over another — which that fracture often causes. One is the crack; the other is the shift it produces.
Does a scoliosis diagnosis mean I'll need surgery?
Usually not. Most mild curves are simply monitored, especially after growth is complete. Surgery is reserved for curves that are large, progressing, or causing significant symptoms — a small minority of cases.
My MRI says “degenerative changes” — should I be worried?
Not necessarily. Degenerative changes are the expected wear of an aging spine and appear on most MRIs after middle age. They only matter if a specific finding lines up with your symptoms and exam — the words alone don't determine treatment.
When should confusing spine terminology prompt a second opinion?
When a scary-sounding report is being used to recommend surgery without a clear explanation of which finding matches your symptoms. A good consultation translates the report into plain language and ties every recommendation to something found on your exam — if that didn't happen, get another opinion.
Related conditions
Cervical degeneration · Lumbar degeneration · Cervical stenosis · Lumbar stenosis · Spondylolisthesis · Pars fracture · Second opinion