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 sits or stands with neck in neutral. Examiner passively flexes the cervical spine (chin toward chest). A positive response is an electric shock-like sensation radiating down the spine and into the limbs.
Positive Finding
Reproduction of electric shock-like paresthesias radiating down the spine into the extremities with cervical flexion
Sensitivity / Specificity
null / Unknown
Interpretation
Highly suggestive of cervical or upper thoracic myelopathy; indicates demyelination or cord irritation. Non-specific but high clinical utility when present. Not diagnostic alone but warrants imaging investigation.
Romberg Test (Modified for Myelopathy)
Procedure
Patient stands with feet together, eyes closed, arms at sides for 30 seconds. Examiner observes for loss of balance or excessive swaying. If unable to stand safely, use seated version or observation with eyes open first.
Positive Finding
Inability to maintain stable standing position with eyes closed; loss of balance or significant swaying attributable to proprioceptive loss rather than vestibular dysfunction
Sensitivity / Specificity
Unknown / Unknown
Interpretation
Positive finding suggests posterior column involvement (dorsal column dysfunction) consistent with myelopathy. Indicates proprioceptive and sensory tract compromise. Helps differentiate cord compression from peripheral neuropathy.
Hoffman's Sign (Hyperreflexia Screening)
Procedure
Patient's hand rests in relaxed supination. Examiner supports the middle finger and flicks the nail bed distally. Observe for involuntary flexion of the thumb and index finger.
Positive Finding
Brisk involuntary flexion of thumb and/or index finger in response to nail flick; comparison of asymmetry between sides is clinically relevant
Sensitivity / Specificity
null / Unknown
Interpretation
Indicates upper motor neuron lesion and hyperreflexia; suggests spinal cord involvement. Positive finding is concerning for myelopathy and necessitates urgent imaging. Non-specific but high clinical utility when asymmetrical.
Babinski Sign (Plantar Response Test)
Procedure
Patient lies supine with lower limbs relaxed. Examiner firmly strokes the lateral plantar surface of the foot from heel toward the ball of the foot with a blunt object, moving medially across the ball of the foot.
Positive Finding
Dorsiflexion of the great toe with fanning of the other toes (extensor plantar response); abnormal compared to normal flexor response
Sensitivity / Specificity
Unknown / Unknown
Interpretation
Indicates upper motor neuron lesion and corticospinal tract involvement; highly suggestive of spinal cord pathology. A positive sign is a red flag for myelopathy and demands urgent neuroimaging.
Clonus Test (Ankle Clonus)
Procedure
Patient lies supine with knee extended or slightly flexed. Examiner rapidly dorsiflexes the foot at the ankle joint and maintains pressure, assessing for rhythmic oscillations.
Positive Finding
Sustained rhythmic oscillations (≥3–5 beats) of the foot between dorsiflexion and plantarflexion; indicates hyperreflexia
Sensitivity / Specificity
Unknown / Unknown
Interpretation
Pathological clonus indicates upper motor neuron lesion and spasticity from cord involvement. Presence is a red flag for myelopathy. Suggests significant corticospinal tract dysfunction requiring urgent investigation.
Myelopathy Disability Arm Scale (MIDAS) / Nurick Scale Assessment
Procedure
Structured clinical interview and observation of patient's functional abilities: gait quality, hand dexterity, balance, and ability to perform fine motor tasks. Grade functional impairment on established scale (e.g., Nurick: 0–5; MIDAS: arm-specific scoring).
Positive Finding
Increasing severity scores (Nurick ≥2, or MIDAS >10) indicating progressive myelopathic dysfunction; correlation with objective neurological signs
Sensitivity / Specificity
Unknown / Unknown
Interpretation
Quantifies functional impact of myelopathy and tracks disease progression. Helps justify urgency of intervention and baseline measurement for monitoring treatment response. Correlates with imaging severity and prognosis.
⚠ 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
Soft Tissue
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
Articulation
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
MET
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
Articulation
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
Functional
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
Lymphatic
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
Add-On Approaches
Chinese Medicine
Acupuncture targeting bladder meridian points (UB 23, UB 40, UB 57) and governing vessel points (GV 4, GV 14) may support circulation and reduce inflammation; moxibustion over Ming Men (GV 4) to warm yang and improve spinal function; herbal support with supplements addressing qi stagnation and blood stasis (e.g., Dan Shen, Chi-Zhi).
Chiropractic
Specific spinal manipulative therapy may be contraindicated in acute cord compression; however, once cleared by imaging and specialist assessment, gentle diversified or Gonstead-style adjustments to non-compressed segments may support overall spinal biomechanics and proprioceptive input.
Physiotherapy
Progressive motor control and stability training emphasising core engagement, transverse abdominis activation, and neutral spine postures; neurodynamic mobilisation techniques (neural flossing) to improve spinal cord blood flow; postural retraining and ergonomic optimisation; supervised exercise progression based on neurological status.
Remedial Massage
Therapeutic massage to paraspinal tissues, avoiding direct pressure over the compressed segment; focus on releasing upper trapezius, levator scapulae, and rhomboid tension that contributes to upper thoracic rigidity; gentle myofascial release of the latissimus dorsi and serratus anterior to improve thoracic mechanics.
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
- •Acute onset or progressive myelopathic signs (weakness, spasticity, hyperreflexia, clonus)
- •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
- •Failure to improve after 4-6 weeks of conservative management with persistent compression signs
- •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