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Veterinary and comparative orthopaedics and traumatology : V.C.O.T·2021·Retrospective cohort
Myelopathy
Spinal cord dysfunction from compression that affects movement and coordination
ICD-10: G99.2 · cervical condition
Myelopathy — also called spinal cord compression — occurs when the spinal cord itself is squeezed by a narrowed spinal canal, a herniated disc, bone spurs, or other structural changes. Unlike a pinched nerve that causes symptoms in one arm or leg, myelopathy affects the spinal cord and can cause weakness, balance problems, or coordination difficulties in multiple limbs. It most commonly occurs in the neck (cervical myelopathy) and tends to worsen gradually if left untreated.
55
Cervical spondylotic myelopathy is the most common cause of spinal cord dysfunction in adults over 55 in developed countries.
North American Spine Society20–60%
Without treatment, progressive neurological deficit occurs in 20–60% of patients with cervical myelopathy over a 5-year period.
Fehlings MG et al., JAMA (2013)90%
Surgical decompression for cervical myelopathy prevents progression in 90%+ of patients and achieves meaningful neurological improvement in 70–80% of cases.
Fehlings MG et al., JAMA (2013)Symptoms
- Difficulty with fine motor tasks such as buttoning a shirt or handling small objects
- Weakness or heaviness in the arms or legs
- Balance and coordination problems — a sense of unsteadiness when walking
- Numbness or tingling affecting both arms or both legs (may feel like wearing gloves or socks)
- Gait changes — shuffling, wide-based, or unsteady walking
- Neck or back pain (though not always present)
- In severe cases: bladder or bowel dysfunction
Causes & Risk Factors
- Cervical spondylosis — age-related bone spurs and disc degeneration narrowing the spinal canal
- Cervical or thoracic disc herniation pressing on the spinal cord
- Spinal stenosis compressing the cord over time
- Ossification of the posterior longitudinal ligament (OPLL)
- Rheumatoid arthritis causing instability at the top of the cervical spine
- Spinal tumors or cysts pressing on the cord
- Trauma or injury causing acute cord compression
Imaging Findings
Imaging studies are commonly used to identify findings associated with this condition. Results vary by individual; a qualified spine specialist interprets findings in the context of a full clinical evaluation.
MRI
- Spinal cord compression visible on T2-weighted sagittal sequences; T2 intramedullary hyperintensity (bright signal within the cord) indicates existing cord damage and is a negative prognostic factor
- T1 hypointensity within the cord indicates chronic myelomalacia — associated with limited neurological recovery after surgery
- Degree of compression quantified by anterior-posterior cord diameter and cross-sectional cord area; MRI is the gold standard for myelopathy diagnosis and surgical planning
CT Scan
- CT myelogram demonstrates cord deformation and CSF flow restriction when MRI is contraindicated
- Superior to MRI for bony causes of compression: osteophytes, OPLL, and facet hypertrophy
- Essential for surgical planning in complex cases, particularly when hardware artifact from prior instrumentation is present
X-Ray
- Flexion-extension lateral views detect dynamic instability contributing to intermittent cord compression
- May show osteophytes, disc height loss, OPLL, or deformity contributing to the structural cause of cord compression
- Sagittal alignment assessment on standing lateral film guides the surgical approach selection
Who Is Commonly Affected
The following patterns are commonly associated with this condition based on published population studies. Individual presentation varies; these figures are informational only.
Peak Age Range
50–70 years; degenerative causes dominate in this age group — most commonly cervical spondylotic myelopathy
Gender Distribution
Men affected approximately 1.5 times more than women
Estimated Prevalence
Degenerative cervical myelopathy — the most common form — has an estimated prevalence of 20–100 per 100,000 population; it is the leading cause of spinal cord dysfunction in adults in the developed world
Treatment Options
Conservative
- Physical therapy focused on balance, gait, and maintaining functional strength
- Activity modification to avoid activities that worsen cord compression (e.g., contact sports)
- Anti-inflammatory medications for symptom relief (does not treat the compression)
- Soft cervical collar for short-term support during acute flares
- Close neurological monitoring — myelopathy can progress, making watchful waiting a time-limited option
Surgical
- Anterior cervical discectomy and fusion (ACDF) — removes the compressive disc and fuses the segment
- Cervical laminoplasty — expands the spinal canal from the back without full fusion
- Cervical laminectomy with fusion — removes bone at the back of the canal to decompress the cord
- Anterior corpectomy — removes the vertebral body and disc to decompress the cord in complex cases
- Thoracic or lumbar decompression — when myelopathy occurs in the mid or lower back
Conservative Care — What to Expect Without Surgery
Conservative care is generally NOT appropriate as the primary treatment for confirmed myelopathy with functional decline. Spinal cord compression tends to progress without surgical decompression. Mild myelopathy without functional decline may be carefully observed, but patients should be counseled about the risk of progression.
AANS — Cervical Myelopathy guidelinesConservative Treatment Options
Observation (Mild Myelopathy Only)(With serial clinical and imaging follow-up)
For very mild myelopathy without functional decline, watchful waiting with monitoring may be appropriate in select patients. Requires close follow-up.
Activity Modification(Until surgical evaluation)
Avoiding high-risk activities (contact sports, diving) that could cause acute cord injury in the setting of cord compression.
When Is Surgery Typically Considered?
Surgical decompression is the standard of care for progressive or moderate-to-severe myelopathy. The goal of surgery is to halt progression rather than guarantee reversal of established deficits. Early surgery is associated with better outcomes.
Red Flags — Seek Urgent Care
- Any new or progressive myelopathic symptoms — seek same-week or urgent surgical evaluation
- Rapidly progressive weakness, falls, or bowel/bladder changes — seek same-day or emergency evaluation
When to see a spine specialist
Seek evaluation promptly if you notice hand clumsiness, balance problems, or leg weakness — particularly if symptoms are worsening. Myelopathy can progress to permanent spinal cord damage if untreated. Emergency evaluation is warranted for sudden severe weakness, paralysis, or loss of bladder or bowel control.
Specialists Who Treat Myelopathy
Find a specialist who treats myelopathy
NPI-verified spine surgeons in your city.
- Austin, TX
- Charlotte, NC
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- Los Angeles, CA
- Nashville, TN
- New York, NY
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- Phoenix, AZ
- San Antonio, TX
- San Diego, CA
- San Francisco, CA
- San Jose, CA
- Seattle, WA
Find a spine specialist near you
Browse NPI-listed spine surgeons and neurosurgeons who treat myelopathy. Filter by location, insurance, and availability.
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Questions to Ask Your Doctor
Bring these questions to your next appointment about myelopathy.
- 1
Do my MRI images show any signal change within the spinal cord itself — and does that finding change my prognosis or the urgency of treatment?
- 2
How quickly should I pursue surgery given my current level of disability — balance problems, hand weakness, and walking difficulty?
- 3
Which surgical approach is most appropriate for my anatomy: anterior decompression, posterior decompression, or a combined approach?
- 4
What improvement in coordination, walking, and hand function can I realistically expect after decompression — and over what recovery timeline?
- 5
What new symptoms should prompt an emergency evaluation while I am deciding on treatment — for example, sudden worsening or acute difficulty walking?
Research Evidence
5 studies reviewed · sorted by Spine.co trust score
Transthoracic Vertebral Distraction and Stabilization in 10 Dogs with Congenital Thoracic Vertebral Malformations.
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Clinical neurology and neurosurgery·2025·Retrospective cohort
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Journal of veterinary internal medicine·2020·Review
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Clinical neurology and neurosurgery·2025·Review
Researchers found associations between these studies and this condition — this is not a diagnosis or treatment recommendation. Spine.co trust scores reflect methodological quality only. Always consult a qualified spine specialist.
Clinical Evidence
Frequently Asked Questions
Is myelopathy reversible?
It depends on the severity and duration of spinal cord compression. In mild to moderate cases, timely surgical decompression often halts progression and may improve symptoms significantly. However, if the spinal cord has been compressed for a long time, some neurological deficits may be permanent. Early treatment gives the best chance of recovery.
How is myelopathy different from radiculopathy?
Radiculopathy affects a single nerve root — causing symptoms (pain, numbness, weakness) in one arm or one leg, in a specific pattern. Myelopathy affects the spinal cord itself, which means symptoms can affect both arms, both legs, balance, and bladder/bowel function. Myelopathy is generally more serious and typically requires surgical treatment.
Can myelopathy be treated without surgery?
Conservative care can manage symptoms temporarily but does not treat the underlying spinal cord compression. For mild myelopathy with stable symptoms, some physicians recommend careful watchful waiting with physical therapy. However, most spine specialists recommend surgery when myelopathy is diagnosed, because the condition tends to progress and untreated compression can lead to irreversible spinal cord damage.
What causes myelopathy to develop?
The most common cause is cervical spondylotic myelopathy — the gradual narrowing of the spinal canal due to age-related disc degeneration, bone spur formation, and thickening of spinal ligaments. This process is natural with aging, but only a minority of people develop significant cord compression. Disc herniations, ossification of ligaments, and spinal tumors are less common causes.