Cord Compression – Thoracic
SpineOverview
Thoracic cord compression represents mechanical pressure on the spinal cord within the thoracic vertebral canal, potentially causing progressive neurological deficit. This condition requires urgent assessment and imaging given the risk of irreversible cord damage and potential myelopathy. Common causes include disc herniation, vertebral fracture, tumour, stenosis, and ligamentous hypertrophy.
Pathophysiology
The thoracic spinal cord occupies the dorsal aspect of the vertebral canal, with limited space for displacement or swelling. Compression compromises blood flow and axonal transmission, initiating ischaemia and demyelination. The condition may develop acutely (trauma, disc herniation) or insidiously (spondylosis, tumour). Chronic compression triggers gliosis and permanent neurological loss if untreated. The mid-thoracic cord (T4-T6) is particularly vulnerable due to its arterial watershed zone, making this region especially sensitive to ischaemic injury.
Patient Education
Thoracic cord compression is a medical emergency requiring immediate imaging and specialist assessment; persistent or progressive neurological symptoms such as weakness, numbness, or loss of bladder/bowel control demand urgent hospital evaluation to prevent permanent spinal cord damage.
Typical Presentation
Site
Midline thoracic spine with radiation in a dermatomal pattern; symptoms may present bilaterally or as a band-like distribution across the torso
Quality
Deep, aching pain in the thoracic spine; burning or dysaesthetic sensations below the level of compression; heaviness or tightness in the legs; loss of proprioception or vibration sense
Intensity
Variable; may range from mild to severe depending on degree of compression; progressive worsening is a red flag indicating myelopathy
Aggravating
Spinal extension, sustained postures, coughing, Valsalva manoeuvre, neck flexion (Lhermitte's sign), heavy lifting
Relieving
Spinal flexion, lying supine, complete bed rest in acute presentations, NSAIDs (in non-emergency contexts)
Associated
Lower limb weakness or spasticity, gait disturbance (magnetic gait), bladder/bowel dysfunction, loss of temperature discrimination, hyperreflexia below the level of lesion, sustained clonus, erectile dysfunction, exaggerated abdominal reflexes
Orthopaedic Tests
Lhermitte's Sign
Procedure
Patient seated. Ask the patient to bend the head forward, or flex the neck passively, and report any unusual sensations.
Positive Finding
A brief electric-shock sensation running down the spine or into the limbs on neck flexion.
Interpretation
Points to irritation of the spinal cord, most often in the cervical region (for example cervical myelopathy or multiple sclerosis). It is usually absent with compression lower in the thoracic cord. A positive sign needs medical referral.
Hoffman's Sign (Hyperreflexia Screening)
Procedure
Hold the patient's relaxed middle finger and flick the nail downwards.
Positive Finding
Reflex flexion of the thumb and index finger.
Interpretation
An upper motor neuron sign in the arm, reflecting compression of the cervical cord. With thoracic cord compression Hoffmann's sign should be normal; if it is positive, the cervical cord may be involved. Some healthy people have a mild, symmetrical response.
Romberg Test (Modified for Myelopathy)
Procedure
Ask the patient to stand with feet together, first with eyes open and then eyes closed, for 30 seconds. Stand close by to prevent a fall.
Positive Finding
Balance is maintained with eyes open but lost with eyes closed.
Interpretation
Suggests loss of position sense, which can come from the dorsal columns of the spinal cord or from peripheral neuropathy. With other cord signs it supports myelopathy and needs urgent medical referral.
Babinski Sign (Plantar Response Test)
Procedure
Patient supine and relaxed. Stroke the outer sole of the foot firmly from heel towards the little toe and curve across the ball of the foot.
Positive Finding
The big toe extends upwards, often with fanning of the other toes.
Interpretation
An upper motor neuron sign showing corticospinal tract involvement anywhere from the brain to the spinal cord. With back pain or leg symptoms, it needs same-day medical assessment for spinal cord compression.
Clonus Test (Ankle Clonus)
Procedure
Patient supine, knee slightly bent and supported. Briskly dorsiflex the ankle and hold gentle pressure.
Positive Finding
Rhythmic, repeated beats of the foot. Sustained clonus is always abnormal; a few beats that stop may be normal if symmetrical.
Interpretation
Sustained clonus is an upper motor neuron sign. With back pain or leg symptoms it needs same-day medical assessment for spinal cord compression.
Nurick Grade / Functional Myelopathy Scales (e.g. mJOA)
Procedure
Ask about and observe walking, balance, hand function and ability to work, and grade them on a recognised scale such as the Nurick grade (based on walking) or the modified Japanese Orthopaedic Association (mJOA) score.
Positive Finding
A worse grade than at the previous assessment, or impaired walking or hand function attributed to myelopathy.
Interpretation
These scales describe how much myelopathy affects function and track change over time; they do not diagnose cord compression. Any worsening needs prompt medical review. (MIDAS, previously named here, is a migraine disability scale.)
⚠ Red Flags
- •Progressive myelopathic signs: weakness, spasticity, hyperreflexia, clonus
- •Acute onset neurological deficit (suggests cord infarction or traumatic compression)
- •Bladder or bowel dysfunction, urinary retention, faecal incontinence
- •Bilateral lower limb symptoms or saddle anaesthesia (cauda equina-like presentation)
- •Severe, unrelenting pain unresponsive to conservative management
- •Fever, weight loss, night sweats (malignancy or infection)
- •History of trauma with neurological symptoms
- •Imaging evidence of cord signal change (T2-weighted hyperintensity indicating cord oedema or infarction)
⚡ Yellow Flags
- •Catastrophic thinking or fear-avoidance regarding spinal cord damage
- •Significant psychosocial distress accompanying neurological symptoms
- •Poor medication adherence or non-compliance with investigations
- •Workplace or ergonomic factors contributing to postural stress
- •History of depression or anxiety complicating symptom presentation
- •Secondary gain or compensation-seeking behaviour
Osteopathic Techniques
Region
Thoracic spine (mid-thoracic emphasis T4-T6)
Technique
Rationale
Soft tissue mobilisation to the paraspinal musculature, latissimus dorsi, and erector spinae reduces muscular guarding and improves segmental mobility, facilitating improved venous and lymphatic drainage around the compressed cord without imposing mechanical stress
Region
Cervical-thoracic junction (C7-T2)
Technique
Rationale
Gentle articulation of the cervical-thoracic junction addresses proximal biomechanical restrictions that may contribute to overall thoracic canal stenosis; this region influences overall spinal mechanics and neural mobility
Region
Lumbar spine and pelvis
Technique
Rationale
Muscle energy techniques applied to the quadratus lumborum, psoas, and hip musculature address lower compensatory patterns that may increase thoracic kyphosis and worsen cord compression; improving lumbopelvic mechanics reduces thoracic strain
Region
Rib cage and costovertebral joints
Technique
Rationale
Restricted rib mechanics increase thoracic rigidity and reduce spinal mobility; gentle articulation of costovertebral joints improves respiration and segmental spinal dynamics, reducing mechanical stress on the compressed cord
Region
Thoracic spine (segmental level)
Technique
Rationale
Functional technique in flexion or neutral positioning avoids extension mechanisms that compress the cord; facilitates proprioceptive neuromuscular engagement and promotes segmental stability without provocative loading
Region
Thoracic and lumbar lymphatic system
Technique
Rationale
Enhanced lymphatic drainage reduces cord oedema and supports neural tissue health; addressing thoracic duct function and paravertebral lymphatic chains may reduce inflammatory burden contributing to compression symptoms
Rehabilitation Exercises
Thoracic Spine Flexion-Extension in Supine
Gentle Thoracic Rotation in Sitting
Thoracic Kyphosis Release (Child's Pose Variation)
Pectoralis Minor and Major Stretching in Doorway
Transverse Abdominis Activation (Supine Hollowing)
Prone Spinal Stabilisation (Modified Superman)
Quadruped Core Stability with Alternating Limb Extension
Neutral Spine Posture Training in Sitting
Scapular Stability and Shoulder Blade Retraction
Standing Balance Progression with Upper Limb Support
Supported Walking Programme (Graded Distance)
Thoracic Spine Lateral Flexion in Sitting
Referral Criteria
- •ANY suspicion of spinal cord compression - acute onset or progressive myelopathic signs (weakness, spasticity, hyperreflexia, clonus) - is a neurosurgical EMERGENCY requiring same-day referral for urgent MRI. Do not observe, do not treat manually, do not schedule a follow-up review.
- •Bladder or bowel dysfunction, urinary retention, or faecal incontinence
- •Bilateral lower limb neurological symptoms or saddle anaesthesia
- •Imaging evidence of cord compression with signal change (T2-weighted hyperintensity)
- •Trauma history with neurological deficit (suspected traumatic myelopathy)
- •Uncontrolled pain or rapidly progressive neurological decline
- •Suspected malignancy, infection (fever, constitutional symptoms), or inflammatory myelopathy
- •Persistent or progressive compression signs - refer immediately, not after a conservative trial. There is no role for a 4-6 week course of conservative management in thoracic cord compression: neurological outcome is a function of time to decompression, and delay risks irreversible paraplegia and sphincter dysfunction. (A previous version of this page listed a 4-6 week conservative trial at this position.)
- •Any suspicion of cord infarction (acute paraplegia with spinal cord signal change)
- •Referral to spinal surgeon for urgent assessment if imaging confirms significant compression with cord signal change