Spinal stenosis: lumbar and cervical — the Australian general practice approach

Spinal stenosis in the ageing Australian population

Spinal stenosis — narrowing of the spinal canal, lateral recess, or neuroforamina — is the most common indication for spinal surgery in Australians aged 65 and over. Imaging prevalence of lumbar stenosis reaches 20–30% in adults over 60, though approximately 10% are clinically symptomatic. Degenerative change (facet joint osteoarthritis, disc desiccation, ligamentum flavum hypertrophy, and spondylolisthesis) accounts for more than 95% of cases.

The presenting syndromes depend on the level of stenosis. Lumbar spinal stenosis (LSS) causes neurogenic claudication — leg symptoms provoked by walking or standing, relieved by flexion. Cervical stenosis / degenerative cervical myelopathy (DCM) compresses the spinal cord and produces upper motor neuron signs: gait disturbance, hand clumsiness, and hyperreflexia. Thoracic stenosis is uncommon.

Understanding these two distinct presentations matters in general practice because their management strategies diverge significantly: LSS is primarily conservative, while DCM usually warrants surgical referral to preserve cord function. The shared imperative across both is recognising cauda equina syndrome — bilateral leg weakness, saddle anaesthesia, and bladder or bowel dysfunction — as a same-day surgical emergency.

A. Core clinical — the AU general-practice framework

History: pattern recognition

Lumbar spinal stenosis — neurogenic claudication:

• Bilateral leg pain, paraesthesia, or weakness brought on by walking, standing, or lumbar extension
• Relieved by sitting, squatting, or forward flexion — the “shopping trolley sign” (leaning on a trolley while walking); cycling is often tolerated well
• Walking tolerance in metres before symptom onset is a useful functional metric for monitoring
• Back pain is variable; leg symptoms often dominate and the back may be minimally affected
• Distinguishing from vascular claudication: neurogenic relief requires flexion, not simply stopping; cycling is possible; pulses and ABPI should be checked

Cervical stenosis / DCM:

• Gait disturbance — broad-based, shuffling, frequent stumbles; patients may attribute this to ageing
• Hand clumsiness — difficulty with buttons, typing, handwriting, small objects
• Non-dermatomal paraesthesia in hands or feet
• Lhermitte’s symptom — electrical sensation down the spine on neck flexion
• Urinary urgency or frequency in advanced disease
• Progressive worsening over months to years

Cauda equina red flags — immediate hospital transfer:

• Saddle anaesthesia (perianal, perineal, genital numbness)
• Acute urinary retention or new urinary incontinence
• Faecal incontinence or loss of anal tone
• Bilateral severe lower limb weakness
• Sexual dysfunction developing acutely alongside the above

Examination

Gait observation — observe unassisted walking; forward-flexed posture typical in LSS; broad-based ataxic gait in DCM.

Lower limb neurological (LSS): power (hip flexors, quads, dorsiflexors, plantar flexors), sensory (light touch, pinprick, vibration — map dermatomes if radicular), reflexes (reduced or absent in LSS; note that coexistent diabetes or alcoholic neuropathy may suppress reflexes at baseline).

Upper motor neuron signs (DCM): brisk reflexes, clonus, Babinski, Hoffmann’s sign (flex distal phalanx of middle finger; thumb flexion = upper motor neuron), spasticity in legs, impaired rapid alternating movements in hands.

Modified JOA score (mJOA) for DCM severity — motor + sensory + sphincter subscores; mild ≥15, moderate 12–14, severe ≤11 per AOSpine Fehlings guidelines.

Specific manoeuvres:

• Walking test — distance to symptom onset; observe posture and relief with sitting
• Stoop test — symptoms reproduced on extension, relieved by stooping = LSS
• Straight leg raise — typically negative in central LSS; positive finding favours disc herniation rather than stenosis
• Hip examination — internal rotation restriction and FABER test to exclude hip OA masquerading as radicular pain

Vascular check (LSS): peripheral pulses at femoral, popliteal, dorsalis pedis, and posterior tibial; ABPI if vascular claudication suspected.

Investigations

MRI spine (without contrast) — gold standard for canal and foraminal stenosis, disc, ligamentum flavum hypertrophy, cord signal change, and spondylolisthesis (NASS 2011/2024). Correlate carefully with symptoms — asymptomatic stenosis on imaging is common and should not drive management in isolation.

Plain X-ray (AP and lateral ± flexion-extension) — alignment, spondylolisthesis grading, instability, fracture; first-line when MRI not yet available or to plan surgical approach.

ABPI / arterial duplex — when vascular claudication is a realistic differential.

EMG / nerve conduction studies — when peripheral neuropathy (diabetic, alcoholic) co-exists and confounds the clinical picture.

Bloods if red flags — FBC, ESR, CRP, U&E, calcium, ALP, LDH, B12, HbA1c; to exclude malignancy, infection (Paget’s disease, myeloma, vertebral osteomyelitis, epidural abscess) as rare but serious causes.

B. Lumbar spinal stenosis — evidence-based management

Conservative management — first-line

Education and reassurance — explain the mechanism (flexion good, extension worsens symptoms), pacing, activity modification, and fall-prevention. Reassure that LSS without major neurological deficit does not inevitably progress (NASS 2011).

Physiotherapy — flexion-biased exercise programme — core stability, Williams’ flexion exercises (posterior pelvic tilt, knee-to-chest, hamstring stretch), aerobic conditioning (stationary cycling, hydrotherapy). Delitto Annals 2015 demonstrated non-inferiority of structured physiotherapy versus surgery at two years in patients without progressive deficit.

Walking aids — four-wheel walker with seat allows forward-flexed posture and rest breaks; improves walking tolerance and reduces fall risk, particularly important in older adults.

Pharmacological — short-course only:

• Paracetamol 1 g four times daily — modest evidence; generally safe in older adults; use as scheduled short courses rather than as-needed
• NSAIDs — ibuprofen, naproxen, or celecoxib short-course; caution in older adults for renal, gastrointestinal, and cardiovascular risk
• Gabapentinoids (pregabalin, gabapentin) — limited evidence specifically for neurogenic claudication; sedation and fall risk in older adults; Faculty of Pain Medicine ANZCA cautions; SafeScript/real-time prescription monitoring (RTPM) required; review at four weeks and cease if no clear benefit
• Duloxetine — neuropathic component; Authority Required on PBS
• Amitriptyline low dose (10–25 mg nocte) — Authority Streamlined on PBS for neuropathic pain
• Avoid long-term opioids — RACGP and Faculty of Pain Medicine ANZCA recommend against for chronic non-cancer musculoskeletal pain; if prescribed, use with a documented deprescribing plan

Epidural steroid injection — limited and short-lived benefit; Friedly NEJM 2014 showed no advantage over local anaesthetic injection at six weeks. Consider only in refractory radicular pain with informed consent about procedural risks.

Multidisciplinary chronic pain care — pain clinic referral, CBT for pain, exercise physiology, occupational therapy for workplace and home adaptation.

Surgery — when to consider

Decompressive laminectomy is considered for:

• Refractory pain or functional limitation after six to twelve weeks of structured conservative care
• Progressive neurological deficit (motor weakness)
• Significantly impaired quality of life despite adequate non-operative management

Evidence: SPORT (Weinstein NEJM 2008) demonstrated surgical superiority at two years in as-treated analysis; benefit attenuates over four to eight years. Försth NEJM 2016 showed decompression alone non-inferior to decompression plus fusion for stenosis without instability — add fusion only when spondylolisthesis with motion is present.

C. Cervical myelopathy — when the spinal cord is at risk

Recognising DCM in general practice

DCM is frequently missed for months to years in general practice because gait instability and hand clumsiness are often attributed to “normal ageing.” Key clinical cues:

• Gait change that does not fit typical orthopaedic diagnoses (hip or knee OA rarely causes broad-based gait)
• Hyperreflexia when the history suggests degeneration should cause hyporeflexia
• Hoffmann’s sign positive in the upper limbs
• History of unexplained falls, particularly falls without loss of consciousness

Document mJOA score at first presentation for baseline and for monitoring.

Management of DCM

Symptomatic moderate to severe DCM (mJOA ≤14) — refer to neurosurgical or spinal orthopaedic surgeon; early decompression is the evidence-based approach. Without surgery, approximately 20–60% of patients deteriorate neurologically over three to six years (AOSpine Fehlings 2017).

Mild DCM (mJOA ≥15) with non-disabling symptoms — structured observation with six-monthly mJOA review; surgery versus watchful waiting is a shared decision informed by rate of progression, patient preference, and surgical risk.

While awaiting surgical referral or decision:

• Paracetamol, NSAIDs, and neuropathic agents for symptom control
• Avoid contact sport and high-risk activities that could cause neck injury (cord has reduced reserve at the stenotic level)
• Fall-prevention counselling

Pharmacological agents do not decompress the cord — they manage symptoms only.

D. Australian operations

MBS items

• GP consultations — items 23, 36, 44; GPCCMP (Chronic Conditions Management Plan) items 965 (preparation) and 967 (review) for chronic spinal stenosis with functional limitation
• 75+ Health Assessment — item 707; falls assessment and mobility review
• Aboriginal and Torres Strait Islander Health Assessment — item 715
• Mental Health Care Plan — items 2715 / 2717 for comorbid depression and anxiety in chronic pain
• Specialist referral — items 105 / 106 (orthopaedic, neurosurgical, pain medicine)
• Spine X-ray — items 58300 / 58301
• MRI lumbar or cervical spine — item 63491 (limited GP-requestable eligibility; specialist-requested in most contexts)
• CT myelogram — item 56507 (specialist-billed; for MRI-ineligible patients)
• EMG / nerve conduction studies — item 11324
• Allied health under GPCCMP — physiotherapy (item 10960), exercise physiology (item 10954), occupational therapy — five sessions per year (ten for Aboriginal and Torres Strait Islander patients)

PBS items

• Paracetamol — general / OTC
• NSAIDs — general / OTC; cautious use in older adults
• Pregabalin / gabapentin — Authority Required for neuropathic pain; SafeScript / RTPM monitored
• Duloxetine — Authority Required (diabetic neuropathic pain on PBS; off-label for stenosis-associated pain)
• Amitriptyline — Authority Streamlined for neuropathic pain
• Opioids — Authority Required; SafeScript; avoid as chronic strategy

My Aged Care and community supports

Refer to My Aged Care for home modifications (grab rails, shower aids, non-slip surfaces), mobility aids assessment (occupational therapist), and in-home support where walking limitation and fall risk impair independent living.

E. Special populations

Older adults (>75 years). LSS is particularly common in this group and is a major contributor to falls and reduced mobility. Walking aids are especially important. Gabapentinoids and sedating analgesics carry heightened sedation and fall risk — use minimally and monitor closely. Surgical risk is higher but remains acceptable in well-selected older patients. GPCCMP coordinated multidisciplinary care (physiotherapy, exercise physiology, OT, falls review) offers the most sustainable approach.

Patients with type 2 diabetes. Diabetic peripheral neuropathy and LSS coexist frequently and compound each other. Both conditions cause glove-and-stocking sensory loss and absent ankle reflexes, which may mask the depressed reflexes expected in LSS while also missing the hyperreflexia of DCM. Address glycaemic management alongside spinal care; improving neuropathy may reduce functional limitation.

Overweight and obesity. Excess body weight increases lumbar load and progression of disc degeneration. Weight management referral (dietitian under GPCCMP) is an evidence-based adjunct to physiotherapy. Epidural lipomatosis — excess intraspinal fat causing stenosis — is a rare complication of obesity and chronic corticosteroid use.

Workers and occupational considerations. Prolonged standing, heavy lifting, and lumbar extension tasks provoke LSS symptoms. Occupational therapist assessment for workplace modification, graduated return-to-work plans, and workers’ compensation documentation where relevant. DVA Gold and White Card holders are eligible for streamlined orthopaedic referral.

People with connective tissue disorders or inflammatory arthropathy. Ankylosing spondylitis can cause late cauda equina syndrome (dural ectasia syndrome). Epidural abscess or vertebral osteomyelitis in immunosuppressed patients or those on biological agents must be excluded when pain is severe and systemic features are present.

When to escalate

Transfer to emergency department immediately for any cauda equina symptoms — saddle anaesthesia, urinary retention, faecal incontinence, or bilateral leg weakness. This is a time-sensitive surgical emergency.

Refer semi-urgently to a spinal surgeon for: progressive motor weakness (foot drop, proximal leg weakness), symptomatic DCM with mJOA ≤14, new myelopathy signs, rapid neurological deterioration, or suspected spinal cord compression from tumour, infection, or fracture.

Refer routinely (within four to eight weeks) for LSS not responding to six to twelve weeks of structured conservative care with an adequate physiotherapy trial.

What this article is and is not

This is general health information drawn from Australian general practice guidelines — RACGP, Therapeutic Guidelines, AOA, Spine Society of Australia — and the major spinal surgery trials (SPORT, Försth, Friedly, AOSpine DCM guidelines). It is not personal medical advice and does not create a doctor–patient relationship. Decisions about MRI, surgery, and analgesia depend on individual clinical assessment.

Consumer resources: HealthDirect — Spinal stenosis, Better Health Channel — Back pain, MSK Australia.

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Sources cited

1. RACGP — Musculoskeletal and chronic pain resources
2. Therapeutic Guidelines (eTG)
3. Australian Medicines Handbook (AMH)
4. Australian Orthopaedic Association (AOA)
5. Spine Society of Australia
6. NASS — Lumbar Spinal Stenosis Guidelines (2011; 2024 update)
7. AOSpine / Fehlings — DCM Clinical Practice Guidelines (Spine 2017)
8. Weinstein JN et al — SPORT trial (NEJM 2008)
9. Försth P et al — Decompression vs decompression + fusion (NEJM 2016)
10. Friedly JL et al — Epidural steroid injection for LSS (NEJM 2014)
11. Delitto A et al — Surgery vs physical therapy for LSS (Ann Intern Med 2015)
12. Faculty of Pain Medicine ANZCA
13. HealthDirect
14. Better Health Channel
15. MSK Australia