Scoliosis is a sideways curvature of the spine, measured on a standing X-ray and reported as a Cobb angle. A curve of 10 degrees or more meets the definition.
In adults it comes in two quite different forms, and telling them apart changes everything that follows.
Adult idiopathic scoliosis is a curve that developed in adolescence and has been carried into adult life. The curve itself is old news; what is new is how a mature, degenerating spine handles it.
Adult degenerative scoliosis — also called de novo scoliosis — is a curve that did not exist in youth and developed later, as the discs and facet joints on one side of the spine wore down faster than on the other. It is a consequence of asymmetric degeneration rather than a growth problem, and it is increasingly common as the population ages.
According to PubMed, a 12-year prospective study followed 60 community volunteers aged 50 to 84 who had no scoliosis at baseline. Twenty-two of them developed a curve of 10 degrees or more over that period. The independent predictors were asymmetric disc degeneration and asymmetric osteophyte formation — specifically, more than a 20 percent decrease in disc height on one side, or an osteophyte more than 5 millimeters longer on one side, predicted the development of a new curve (Kobayashi T, Atsuta Y, Takemitsu M, Matsuno T, Takeda N. Spine (Phila Pa 1976). 2006;31(2):178-82. DOI).
That is a useful mechanism to hold onto. The curve is the visible result of one side of a segment collapsing faster than the other — which means the pain generators are, in the main, the structures that are now being loaded unevenly rather than the curvature as a geometric fact.
This is the single most useful thing to know about adult scoliosis, and it runs against intuition.
Patients with substantial curves are frequently comfortable. Patients with modest curves are frequently not. The reason is that pain in adult scoliosis comes from identifiable structures — a nerve root crowded in the narrowed foramen on the concave side, facet joints loaded asymmetrically, a segment that has become unstable, and paraspinal muscle working continuously to hold the trunk upright — and none of those track cleanly with the Cobb angle.
What does correlate better with symptoms and function in adults is sagittal balance: whether the head sits over the pelvis when you stand. A patient who has to bend the knees or tilt the pelvis to keep their eyes level is doing continuous muscular work, and that is a different and more consequential problem than a coronal curve of similar magnitude.
The practical consequence: an adult with scoliosis and back pain needs the same diagnostic work as an adult without one. The curve is context. It is not, by itself, the answer.
Progressive leg weakness, saddle numbness, or a change in bowel or bladder control is evaluated urgently, not scheduled. Call (314) 481-5000 or go to an emergency department.
Standing imaging, not supine imaging alone. A curve and its balance can only be assessed under load. Full-length standing films show the Cobb angle, the pelvic parameters and whether the head sits over the pelvis. An MRI performed lying down does not, which is why a report from a supine study answers a different question from the one being asked.
Examination. Where the pain is relative to the curve, whether there is a neurological deficit, how balance and gait are affected, and how much muscular work is going into standing upright.
Diagnostic blocks, which do the discriminating. In a curved spine there are always several plausible generators. A small volume of local anesthetic placed precisely under image guidance — onto the medial branches of a specific facet joint, onto a specific nerve root, into the sacroiliac joint — tests them one at a time. In this condition more than most, that is what separates a treatment plan from a sequence of guesses.
Nerve testing where the picture is mixed. EMG and nerve conduction studies separate a compressed root from a peripheral neuropathy.
Exercise and conditioning, which carry more weight here than in most spine conditions. A curved spine is held upright by muscle. Endurance and strength in the trunk extensors and the hips are the difference between a curve that is tolerated and a curve that dominates a day. Deconditioning in adult scoliosis is not a side issue.
Bone health. Curves in older adults frequently coexist with reduced bone density, and a vertebral compression fracture in a curved spine both accelerates deformity and causes acute pain. Bone health belongs in the plan — see fitness and bone strength and, for the fracture presentation, sudden back pain and vertebral fracture.
Metabolic drivers and body weight, because asymmetric load is the mechanism and load is modifiable — medical weight management, lifestyle medicine.
Image-guided injections targeted at a confirmed structure. Selective nerve root blocks and epidural steroid injections for a crowded root; facet injections, medial branch blocks and radiofrequency ablation for confirmed facet pain. All performed under local anesthetic with no sedation — patients are awake, drive themselves home, and resume normal activity, including work, within two to four hours.
Neuromodulation where confirmed nerve pain persists and deformity surgery is not the right answer for that patient — spinal cord stimulation, trialed before implant.
Where adolescent scoliosis is the question. Growing spines are managed differently — monitoring, bracing and growth-related decisions belong with pediatric and deformity specialists, and we will point you toward the right kind of clinic rather than manage it here.
Adult deformity correction is major spinal surgery. It typically involves fusing multiple levels with instrumentation, sometimes with osteotomies to restore alignment, and it carries a materially higher complication and revision profile than the smaller spinal operations discussed elsewhere on this site. It can also transform the life of the right patient. Both of those are true, and a patient deserves both.
It is the right conversation when there is a progressive neurological deficit, when a curve is documented to be progressing, when sagittal imbalance has reached the point of impairing standing, walking or forward gaze, or when severe pain that has been traced to identifiable generators has not responded to a genuine course of conservative and interventional care.
It is not the right answer to the size of a curve on a film in a patient who is functioning, and it is not the answer to back pain in a patient with scoliosis whose actual pain generator has never been tested. A great many adults with curves have pain from a single facet joint or a single crowded nerve root — problems with far smaller solutions.
Dr. Gurpreet Singh Padda, MD, MBA, MHP is a licensed physician and surgeon with surgical privileges, and this practice performs minimally invasive spinal procedures. Where a multilevel deformity correction is what a patient needs, that is said directly and the referral is made — the goal is the right operation, not the nearest one.
Having a curve does not mean your pain has been explained. We see patients from across St. Louis, Florissant, St. Charles and the Illinois Metro East. Call (314) 481-5000 or request an evaluation.
No, and this surprises most patients. Large curves are frequently comfortable and modest curves frequently are not, because the pain comes from specific structures being loaded or crowded — a nerve root in a narrowed foramen, asymmetrically loaded facet joints, muscle working continuously — rather than from the geometry itself. What tracks better with symptoms in adults is whether the head sits over the pelvis when you stand. Read more: When the scan does not match the pain.
That is degenerative or de novo scoliosis, and it develops when one side of a spinal segment collapses faster than the other. In a 12-year study of 60 adults aged 50 to 84 with no curve at baseline, 22 developed one — predicted by more than a 20 percent decrease in disc height on one side or an osteophyte more than 5 millimeters longer on one side. It is asymmetric degeneration made visible. Read more: Where arthritis pain actually comes from.
Some curves progress and many are stable for years, and the useful measurement is change over time on comparable standing films rather than a single number. What is worth monitoring closely is balance and function, not the angle alone — and bone health, because a compression fracture in a curved spine can change the trajectory quickly. Read more: Sudden back pain and vertebral fracture.
They do not change a curve, and nobody should claim they do. What they can do is treat the specific structure that the curve has overloaded — a crowded nerve root, a facet joint — once that structure has been confirmed by a diagnostic block. That is frequently the difference between a functioning patient and a surgical candidate. Read more: Diagnosing facet pain with a medial branch block.
Yes, and it does real work. A curved spine relies on muscular endurance to stay upright, so trunk and hip conditioning changes how much of a day the curve dominates. What matters is a program built for your curve and your balance rather than a generic back routine. Read more: Muscle, myokines and chronic pain.
Because a curve narrows the exit where a nerve root leaves the spine on the concave side. That produces one-sided leg pain along a single line, with numbness or weakness in a matching distribution — which is a separate, testable and often very treatable problem sitting on top of the curve. Read more: Spinal stenosis and leg pain when walking.
It depends on what is actually driving your symptoms and on whether smaller solutions have been genuinely tried. Deformity correction is major surgery with a materially higher complication and revision profile than smaller spinal operations, and it can also be transformative for the right patient. Both facts belong in the conversation, and so does a diagnostic workup that has tested each candidate generator. Read more: Orthopedic surgeon, neurosurgeon or pain physician?
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