Thoracic myelopathy occurs when the spinal cord is compressed in the middle part of the back. It can begin slowly, with clumsiness when walking, stiff legs, tingling or a “belt-like” sensation around the chest. Not all back pain is serious, but when there are neurological symptoms it should be investigated early to avoid deterioration.
- Thoracic myelopathy is not a muscle strain: it implies injury to the spinal cord.
- The most useful signs are gait disturbance, leg stiffness, loss of balance, tingling and changes in sphincter control.
- Magnetic resonance imaging (MRI) is usually the main test; CT helps if there is bone involvement, calcification, fracture or for surgical planning.
- Treatment depends on the cause: thoracic disc herniation, stenosis, ossification of the ligamentum flavum, deformity, tumor, infection or fracture.
- Surgery may be necessary if there is progressive spinal cord compression, but not all cases require the same technique.
What is thoracic myelopathy
“Myelopathy” means altered function of the spinal cord. “Thoracic” indicates that it occurs in the middle part of the spine, between the neck and the lumbar area. The spinal cord is like the main cable that connects the brain with the arms, trunk, legs, bladder and bowel. When it is compressed, symptoms do not always appear exactly where the lesion is: they can be felt in the legs, balance, sensation or urinary control.
The thoracic region is less mobile than the neck or lumbar area because it is attached to the ribs. For this reason, thoracic disc herniations and thoracic stenosis are less frequent, but when they compress the cord they can be more delicate. The thoracic canal is narrow and the cord has less margin to tolerate pressure.
The most common causes include thoracic disc herniation, osteoarthritis with canal narrowing, ossification of the ligamentum flavum, deformity with kyphosis or scoliosis, fractures, tumors, infections and sequelae of previous surgeries. In people with osteoporosis or a history of cancer, new mid-back pain deserves particularly careful evaluation.
Symptoms and indications
9 signs worth recognizing
Thoracic myelopathy can begin subtly. These signs do not confirm the diagnosis by themselves, but they do justify medical evaluation if they appear, progress or combine:
- Difficulty walking straight or a feeling that the legs do not respond the same.
- Stiffness, spasticity or “hard” legs, especially when going down stairs.
- Loss of balance, stumbling or the need to constantly look at the ground.
- Tingling, numbness or a current-like sensation in the trunk or legs.
- Pain that wraps around the chest or abdomen like a belt.
- Progressive weakness in one or both legs.
- Increased fatigue when walking, with changes in posture or stride.
- New urinary or bowel changes, such as urgency, retention or leakage.
- Back pain associated with fever, a history of cancer, trauma or unexplained weight loss.
An important difference: a muscle strain in the back usually hurts with certain movements, palpation or postures, but it usually does not produce loss of strength, clear alteration of gait or sphincter problems. When the main symptom is neurological, it is not appropriate to explain everything as “muscle tension.”
Diagnosis
The diagnosis begins with a detailed medical history: when the problem started, whether it is progressing, how far the patient can walk, whether there is night pain, fever, trauma, previous cancer or spine surgery. Then a neurological examination is performed assessing strength, reflexes, sensation, muscle tone, balance and gait.
MRI is the key test to visualize the spinal cord, discs, canal and signal changes within the cord. If compression by bone, calcification, fracture or deformity is suspected, CT provides bony detail. Full-spine standing X-rays can be useful when there is scoliosis, kyphosis or postural imbalance. In some cases, neurophysiological studies, blood tests or contrast studies are added if infection, inflammation, tumor or another non-degenerative cause is suspected.
An abnormal image alone is not enough to decide treatment. What matters is that the symptoms, the examination and the imaging tell the same story. It is also necessary to rule out problems that mimic myelopathy, such as peripheral neuropathies, other neurological diseases, vascular disorders, hip pathology or metabolic disturbances.
Possible treatments
Non-surgical alternatives
If there is no progressive neurological deficit or severe compression, some situations can be managed conservatively with observation. This may include education, activity modification, cautious physiotherapy, analgesia, treatment of osteoporosis if present, control of inflammatory diseases or specific therapy if the cause is not mechanical. Rehabilitation should avoid aggressive maneuvers if known spinal cord compression exists.
Injections can relieve certain associated pains, but they do not decompress the spinal cord. Therefore, if the main problem is the cord, the goal is not to “mask” the pain but to decide whether the cord is at risk.
Surgical options
When there is spinal cord compression with neurological deterioration, surgery usually aims to decompress the cord and, if necessary, stabilize the spine. The technique depends on the cause and the location of the compression:
- Posterior decompression, such as thoracic laminectomy or laminoplasty, for stenosis or posterior ossification.
- Thoracic discectomy via posterolateral, lateral, thoracoscopic or endoscopic approaches for selected herniations.
- Instrumented fusion if there is instability, deformity, fracture, wide bony resection or risk of collapse.
- Deformity correction if kyphosis or scoliosis contributes to compression, pain or functional loss.
- Oncological or infectious surgery when there is a tumor, abscess or vertebral destruction.
There is no universal technique. In the thoracic spine the direction of compression, the calcification of the herniation, bone quality, overall alignment and the preoperative neurological status are very important when deciding the approach.
Benefits, risks and adverse effects
The main benefit of treating significant thoracic myelopathy is to halt neurological deterioration and, in some cases, recover part of gait, strength or sensation. Recovery depends on how long the cord has been compressed, the prior severity, age, comorbidities and the exact cause.
Risks include infection, bleeding, hematoma, cerebrospinal fluid leak, neurological injury, transient or permanent worsening, persistent pain, thrombosis, respiratory complications with thoracic approaches, implant failure, pseudarthrosis and the need for reoperation. In deformity or revision surgeries the risk is usually higher than in simple procedures.
Intraoperative neurophysiological monitoring can help monitor cord and nerve function during surgery, but it does not eliminate risk. Correct indication and careful planning remain the most important aspects.
Referral criteria
Specialist referral is advisable if there is persistent back pain with gait disturbance, stiff legs, weakness, progressive tingling, signs of cord involvement on examination, MRI showing thoracic compression, progressive deformity, vertebral fracture, history of cancer or suspected infection.
Referral should be prioritized if symptoms progress over weeks or days. The spinal cord tolerates prolonged compression worse than an isolated nerve root. Waiting months in the face of worsening gait may reduce the chances of recovery.
Realistic recovery
After conservative treatment, progress is measured in weeks and requires monitoring. If neurological symptoms progress, the plan is reassessed.
After thoracic surgery, the length of stay can range from a few days for less invasive procedures to a longer hospitalization for fusions, deformities or complex cases. Walking is usually started early if the neurological status allows. Basic activities recover progressively during the first weeks. Neurological improvement can take months, and in some cases residual deficits remain.
For sedentary jobs, a partial return may be considered within several weeks if pain is controlled and there are no complications. Physical jobs, heavy lifting, twisting and high-impact activities usually require more time, often several months, especially after fusion or deformity correction. Rehabilitation must be adapted to the type of surgery and the cord’s response.
When to go to the emergency room
Go to the emergency room if rapid weakness appears in one or both legs, new inability to walk, loss of control of urine or stool, urinary retention, numbness in the genital or perineal area, fever with severe back pain, pain after trauma, progressive back pain with a history of cancer or sudden neurological worsening. In these scenarios it is better to rule out an emergency than to wait until the damage is greater.
Myths and realities
- Myth: “If it hurts in the mid-back, it must be muscular.” Reality: often it is, but gait, strength and sphincter changes change the priority.
- Myth: “Myelopathy always causes severe pain.” Reality: clumsiness or stiffness can predominate more than pain.
- Myth: “An MRI showing compression always requires surgery.” Reality: the decision depends on symptoms, examination, severity and progression.
- Myth: “Surgery guarantees full recovery.” Reality: it can halt deterioration and improve function, but it does not promise complete recovery.
- Myth: “Intense physiotherapy always helps.” Reality: with spinal cord compression, exercises must be cautious and supervised.
Frequently asked questions
Is thoracic myelopathy the same as a dorsal herniated disc?
No. A thoracic herniated disc can be a cause, but myelopathy means the spinal cord is affected. It can also be due to stenosis, calcifications, deformity, tumor, infection or fracture.
Can it cause symptoms in the legs even though the problem is in the mid-back?
Yes. The thoracic cord carries signals that affect the legs. Therefore stiffness, clumsiness, weakness, tingling or gait disturbance can appear.
Is surgery always necessary?
Not always. If there is no neurological deterioration or relevant compression, observation and conservative treatment can be considered. If the cord is compressed and symptoms progress, surgery is usually given higher priority.
Is MRI enough to decide?
It is fundamental, but not the only factor. The decision must integrate symptoms, neurological exam, progression, imaging and personal risks.
Is gait recovery immediate?
Not necessarily. Some people improve after decompression of the cord, but neurological recovery can take months and may be partial if the compression was longstanding.
What is the difference between radiculopathy and myelopathy?
Radiculopathy affects a nerve root and usually causes radiating pain in a specific territory. Myelopathy affects the spinal cord and can alter gait, balance, muscle tone and sphincters.
Can I exercise if I suspect myelopathy?
Light activity may be reasonable if it does not worsen symptoms, but intense exercise, manipulation or impact should be avoided until the diagnosis is confirmed when neurological signs are present.
When is it an emergency?
If there is rapid weakness, new bladder or bowel problems, inability to walk, fever, trauma or a history of cancer with progressive pain, urgent evaluation is required.
Glossary
- Myelopathy: altered function of the spinal cord.
- Thoracic spine: middle part of the spine, related to the ribs.
- Stenosis: narrowing of the canal through which the spinal cord or nerves pass.
- Thoracic disc herniation: protrusion or bulging of a disc in the dorsal region.
- Ossification of the ligamentum flavum: hardening or calcification of a posterior ligament that can compress the cord.
- Decompression: surgery aimed at creating space around the spinal cord or nerves.
- Fusion or arthrodesis: joining two or more vertebrae to stabilize a segment.
- Spasticity: abnormal increase in muscle tone, with stiffness and difficulty moving.
References
- Diagnosis and Management of Thoracic Myelopathy. PubMed. https://pubmed.ncbi.nlm.nih.gov/38739870/ Year 2024.
- Degenerative Thoracic Myelopathy: A Scoping Review of Epidemiology, Genetics, and Pathogenesis. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11394495/ Year 2024.
- Thoracic Discogenic Syndrome. NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK470388/ Year 2024.
- Evaluation of Myelopathy and Radiculopathy. NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK608592/ Year 2024.
- Myelopathy: What It Is, Causes, Symptoms and Treatment. Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/21966-myelopathy Year 2025.
- Spinal metastases and metastatic spinal cord compression. NICE NG234. https://www.nice.org.uk/guidance/ng234 Year 2023, revised 2026.
- ACR Appropriateness Criteria Myelopathy. American College of Radiology. https://acsearch.acr.org/docs/69484/Narrative/ Year 2021.
- A Clinical Practice Guideline for the Management of Patients With Degenerative Cervical Myelopathy. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC5684844/ Year 2017.
- Thoracic disc herniations: diagnosis, surgical techniques, and complications. PubMed. https://pubmed.ncbi.nlm.nih.gov/40104307/ Year 2024.
- Surgical options in thoracic disc herniation: Evaluating long-term outcomes. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11152522/ Year 2024.
- A systematic review of surgical procedures on thoracic myelopathy. Journal of Orthopaedic Surgery and Research. https://link.springer.com/article/10.1186/s13018-020-02081-y Year 2020.
Health education disclaimer
This content is for educational purposes and does not replace an individual medical evaluation. If there are neurological symptoms, rapid worsening, fever, trauma, a history of cancer or sphincter problems, priority or urgent medical attention should be sought.
