Lumbar Disc Herniation & Sciatica
L4–L5 · L5–S1 Most Commonly Affected · Radiculopathy · Cauda Equina
Lumbar disc herniation occurs when the nucleus pulposus extrudes through the annulus fibrosus, compressing adjacent nerve roots and causing radicular pain (sciatica), sensory loss, and motor weakness. L4–L5 and L5–S1 account for 95% of lumbar disc herniations. Peak incidence: 35–50 years. Up to 90% of patients improve with conservative management within 6–12 weeks.
Signs & Symptoms by Level
| Level | Root Compressed | Pain Distribution | Weakness | Reflex Lost |
|---|---|---|---|---|
| L3–L4 | L4 root | Anterior thigh → medial shin | Knee extension (quad) | Knee jerk (KJ) ↓ |
| L4–L5 | L5 root | Posterior thigh → dorsum foot → big toe | Big toe dorsiflexion (EHL) | None (or ankle jerk) |
| L5–S1 | S1 root | Posterior leg → lateral foot → little toe | Plantar flexion (gastrocnemius) | Ankle jerk (AJ) ↓ |
| Central (large) | Cauda equina | Bilateral legs + saddle area | Bilateral legs, sphincters | Bilateral ↓ — EMERGENCY |
Bilateral leg weakness, urinary retention or incontinence, faecal incontinence, saddle anaesthesia. Requires emergency MRI and surgery within 24–48 hours. Every hour of delay risks permanent sphincter dysfunction.
Treatment
90% of disc herniations resolve within 6–12 weeks with conservative management. Surgery is indicated for failure of conservative care, progressive neurological deficit, or cauda equina syndrome.
- Analgesia ladder: Paracetamol 1g QID → NSAIDs (diclofenac 50mg TID with PPI) → weak opioid (tramadol 50mg TID) → specialist pain management
- Mirogabalin (MIRONEU) 5–15mg BD — Preferred neuropathic agent (superior α2δ subunit selectivity vs pregabalin). Smooth titration. Start 5mg BD, increase by 5mg every 2 weeks to max 15mg BD based on response. Renal adjustment required (CrCl <30)
- Pregabalin 75–300mg BD — Alternative to mirogabalin; equal or slightly lower efficacy for radiculopathy (Cochrane 2019)
- Physiotherapy: McKenzie exercises, neural mobilisation, lumbar stabilisation. Start within 48h of acute episode resolution. Avoid bed rest beyond 2 days
- LOVANZO-D (Diclofenac 75mg + Dexlansoprazole 20mg) — Convenient combined tablet reducing GI risk. Once daily preferred form
- Activity modification: Avoid heavy lifting, prolonged sitting, trunk flexion. Encourage walking and gentle movement
- Lumbar support: Semi-rigid lumbar brace for 2–4 weeks during acute phase; not for long-term use (causes muscle deconditioning)
- Transforaminal epidural steroid injection (TFESI) — Methylprednisolone 40–80mg + local anaesthetic into affected neuroforamen. Provides 4–12 weeks pain relief in 60–70% (SPORT trial). Does not alter long-term surgical outcomes. Available in Multan (IDC, NMC)
- Selective nerve root block (SNRB) — Diagnostic and therapeutic; confirms the symptomatic level before surgery
- Trigger point injections — For secondary paraspinal muscle spasm
- Acupuncture — Moderate evidence for radicular pain reduction (Cochrane 2013). Useful as adjunct
Surgical indications: failure of ≥6 weeks conservative care with persistent disabling sciatica, progressive motor deficit (foot drop), cauda equina syndrome (emergency).
- Microdiscectomy — Gold standard. Tubular retractor or microscope-assisted; 1–2cm incision. 85–90% success rate for leg pain. Hospital stay 1–2 days. Return to work 2–4 weeks
- Standard open discectomy — Appropriate where microscope not available; slightly higher blood loss but equivalent outcomes (SPORT 2006)
- PELD (Percutaneous Endoscopic Lumbar Discectomy) — Minimal invasive technique; 7mm cannula. Available at major centres Lahore/Karachi
- Recurrent disc herniation — Fusion (TLIF) may be preferred over redo discectomy if significant disc height loss or instability
At BVH and Faraz Hospital, microdiscectomy is performed under Zeiss operating microscope with Moon Ray C-arm fluoroscopy for level confirmation. Post-operative mobilisation begins day 1. Outcome tracking via LSRS (Lumbar Spine Rating Score).
- Physiotherapy / Core strengthening — Essential both pre-operatively and post-operatively. McKenzie method, Pilates-based core stability shown superior to general exercise (Cochrane)
- TENS (Transcutaneous Electrical Nerve Stimulation) — Short-term pain relief for radiculopathy; evidence modest but low risk
- Yoga — Gentle yoga (Iyengar style) reduces chronic low back pain scores; avoid forward bending positions in acute disc herniation
- Acupuncture — Best evidence for low back pain component; less clear for radicular symptoms (Level B — AANS)
- Cognitive Behavioural Therapy (CBT) — For chronic pain with fear-avoidance behaviour, kinesiophobia. Reduces disability independently of pain scores
- Massage therapy — Swedish/deep tissue massage for paraspinal spasm; no evidence for disc herniation itself but improves comfort and reduces muscle tension
- Heat therapy — Moist heat 15–20 min for muscle spasm; cold packs for acute inflammatory phase (first 48h). Alternating hot-cold for subacute phase
- Turmeric / curcumin — Anti-inflammatory; may reduce NSAID requirement. 500mg curcumin TID with black pepper (piperine enhances absorption 20-fold)
- Vitamin D supplementation — Deficiency very common in Pakistan; low VitD associated with chronic musculoskeletal pain. Check 25-OH VitD; supplement to >50 nmol/L. Cholecalciferol 1000–2000IU/day
References — Lumbar Disc
- Mayo Clinic Herniated disk. mayoclinic.org
- SPORT 2006 Weinstein JN et al. Surgical vs Nonoperative Treatment for Lumbar Disk Herniation. JAMA 2006;296:2441–50
- Cleveland Clinic Disc Herniation. my.clevelandclinic.org
- Barrow Spine Conditions Resource. barrowneuro.org
Cervical Disc Disease & Myelopathy
C5–C6, C6–C7 Most Common · Radiculopathy vs Myelopathy · ACDF · Laminoplasty
Cervical disc disease ranges from simple radiculopathy (nerve root compression causing arm pain) to cervical spondylotic myelopathy (CSM — spinal cord compression causing progressive quadriparesis). CSM is the most common cause of spinal cord dysfunction in adults over 55 years. Early surgical decompression prevents irreversible cord injury.
Cervical myelopathy has a 30–50% risk of significant deterioration without surgery. MRI showing cord signal change (T2 hyperintensity) indicates cord compromise — refer to neurosurgeon urgently. Do not delay with prolonged conservative management.
Clinical Presentation
Conservative management appropriate for radiculopathy without progressive deficit. Myelopathy with cord signal change should be referred for surgery without prolonged conservative trial.
- Cervical collar (soft) — Short-term 2–4 weeks for acute radiculopathy; reduces muscle spasm. Avoid rigid collars long-term
- NSAIDs + neuropathic agents — Diclofenac + mirogabalin (MIRONEU) or pregabalin. Same radicular pain protocol as lumbar
- Cervical traction — Gravity traction or mechanical; reduces foraminal narrowing. Effective for 50–60% of radiculopathy cases
- Physiotherapy — Cervical isometric exercises, postural correction, manual therapy for facet-related pain. Avoid high-velocity manipulation in myelopathy
- Cervical epidural steroid injection — Interlaminar or transforaminal approach; 50–70% short-term relief for radiculopathy
- Posterior laminoplasty — For multi-level CSM (≥3 levels), preserves motion segment. Expansive cervical laminoplasty (Hirabayashi/Kurokawa techniques)
- Posterior laminectomy + fusion — For multi-level disease with instability or kyphotic deformity; more reliable decompression but sacrifices motion
- Foraminotomy — For posterolateral disc herniation without cord compression; minimally invasive keyhole approach
- Cervical pillow (orthopedic) — Memory foam cervical pillow reduces morning pain by maintaining neutral cervical lordosis during sleep
- Yoga / Tai Chi — Gentle neck stretching and strengthening; avoid extreme extension positions
- Magnesium (AXIUM — Magnesium Glycinate) — 300–400mg/day; muscle relaxant properties, reduces night cramps and nerve irritability. Glycinate form superior absorption with fewer GI side effects
- Ergonomic assessment — Screen height adjustment, monitor at eye level, standing desk intervals. Essential for desk workers. May prevent progression of degenerative changes
References — Cervical Disc
- Mayo Clinic Cervical Myelopathy. mayoclinic.org
- MGH Cervical Spine Program. massgeneral.org
Lumbar Spinal Stenosis
Canal Narrowing · Neurogenic Claudication · Laminectomy · Epidural Injections
Lumbar spinal stenosis is the narrowing of the spinal canal (central stenosis) or neural foramina (foraminal stenosis) at one or more lumbar levels, most commonly due to degenerative changes: hypertrophied ligamentum flavum, osteophytes, facet joint arthropathy, and disc bulging. Most commonly affects L4–L5. Affects up to 10% of adults over 60 years.
- Physical therapy — Flexion-based exercises (bicycle, walking with forward trunk lean); aquatic therapy excellent for elderly. Core strengthening reduces lumbar lordosis
- NSAIDs — Moderate pain relief; careful in elderly (renal, cardiac, GI risks). Topical diclofenac gel safer alternative
- Neuropathic agents — Mirogabalin or pregabalin for radicular component
- Calcitonin nasal spray — Some evidence for neurogenic claudication; mechanism unclear; 200IU/day for 3 months
- Walking aids — Nordic walking poles or shopping trolley (forward lean position) significantly improves walking distance
Surgery produces significantly better outcomes than conservative care at 4 years for moderate-severe stenosis (SPORT trial 2008).
- Laminectomy (decompression) — Removal of laminae and ligamentum flavum; bilateral decompression. Standard at BVH. 85% success for walking limitation. Hospital 3–5 days
- Laminectomy + fusion — For concurrent spondylolisthesis or segmental instability; prevents post-laminectomy kyphosis
- MILD procedure (Minimally Invasive Lumbar Decompression) — Removes hypertrophied ligamentum flavum through 2mm portal; for mild-moderate central stenosis in high-surgical-risk elderly
- Interspinous spacer devices — e.g. X-STOP; opens foramina in flexion; limited durability evidence
- Epidural steroid injection (caudal/interlaminar) — Short-term relief 3–6 months in 50–60%; useful bridge to surgery or for surgical risk patients
- Caudal epidural — Safe in elderly anticoagulated patients; methylprednisolone 80mg in 20ml saline + local anaesthetic
- Aquatic therapy — Buoyancy reduces axial loading; excellent for elderly with comorbidities. 3× weekly for 8 weeks significantly improves claudication distance
- Acupuncture — Some evidence for pain reduction in spinal stenosis; multiple systematic reviews show modest benefit
- Vitamin B12 — Neuroprotective; 1000–1500mcg/day methylcobalamin. Addresses nutritional neuropathy component common in Pakistan (vegetarian diets)
- Weight management — Each kg excess weight adds ~4kg axial load to lumbar spine. Weight reduction directly reduces pain scores
Chiari Malformation Type I
Tonsillar Descent ≥5mm · Syringomyelia · Posterior Fossa Decompression
Chiari I malformation is characterized by descent of cerebellar tonsils ≥5mm below the foramen magnum, causing brainstem compression and disruption of CSF flow at the craniocervical junction. Approximately 50–70% of symptomatic Chiari I patients develop syringomyelia. It may be congenital, familial, or acquired (Chiari I.5, Chiari II associated with myelomeningocele).
Posterior Fossa Decompression (PFD) is the definitive surgical treatment for symptomatic Chiari I malformation.
- Suboccipital craniectomy — Removal of small bone window at foramen magnum; C1 laminectomy
- Duraplasty — Dura opened and expanded with pericranial or synthetic patch to create more CSF space. Reduces syrinx in 80–90%
- Headache resolution: 85–90%; syrinx stabilisation/resolution: 60–80% at 1 year
- Complications: CSF leak (3–5%), pseudomeningocele, infection, aseptic meningitis (silk reaction to duraplasty material)
- Asymptomatic Chiari I (incidentally found): annual MRI surveillance; surgery if progression
- Mild headaches without syrinx or progression: activity modification, analgesia, 6-monthly MRI
- Avoid contact sports, heavy Valsalva activities (heavy lifting, straining, intense exertion) until surgical decision made
- Syrinx usually regresses after PFD — no separate shunt required in most cases
- Persistent/progressive syrinx post-PFD: syringosubarachnoid shunt or syringopleural shunt
- Post-op MRI at 6 months: assess syrinx response and adequacy of decompression
References — Chiari / Spine
- Mayo Clinic Chiari malformation. mayoclinic.org
- Barrow Chiari Malformation. barrowneuro.org
- SPORT 2008 Weinstein JN et al. Surgical treatment of spinal stenosis with and without degenerative spondylolisthesis. NEJM 2008;358:794–810
Spinal Cord Injury (SCI)
Complete & Incomplete · ASIA Classification · NASCIS · Early Decompression
Traumatic spinal cord injury results from fracture-dislocation, burst fractures, or penetrating trauma causing cord contusion, compression, or transection. Classification by ASIA (American Spinal Injury Association) impairment scale (A–E). Incomplete injuries (ASIA B–D) have significant recovery potential with early decompression and rehabilitation.
1. Immobilise spine (collar + backboard). 2. Maintain MAP ≥85mmHg for 7 days (spinal cord perfusion). 3. Early MRI to identify surgical targets. 4. Surgery within 24h for incomplete injury with cord compression.
- Decompression within 24h — For incomplete SCI with demonstrated cord compression on MRI; improves motor recovery (STASCIS trial: 2.57-grade improvement)
- Posterior instrumented stabilisation — Fracture-dislocation requires reduction and fixation; prevents secondary injury from instability
- Anterior decompression — For burst fractures with anterior cord compression; corpectomy + cage + plate
- NASCIS III (Controversial) — High-dose methylprednisolone protocol (30mg/kg bolus then 5.4mg/kg/hr × 23h) within 8h: minimal benefit, significant infectious complications. Not routinely recommended by current CNS/AANS guidelines
- MAP ≥85mmHg × 7 days — Vasopressors (norepinephrine) if needed; best evidence for secondary injury prevention
- Urinary catheter — Foley initially; transition to intermittent clean catheterisation (CIC) for neurogenic bladder management
- DVT prophylaxis — Sequential compression devices immediately; LMWH (Clexane 40mg OD) after 24–72h post-operatively
- Pressure ulcer prevention — 2-hourly turns, pressure-relieving mattress, nutritional optimisation
- Neuropathic pain — Pregabalin or mirogabalin; gabapentin as alternative. Amitriptyline for central cord pain syndrome
- Spasticity — Baclofen 5–20mg TID (best evidence); tizanidine 2–8mg TID; intrathecal baclofen pump for severe refractory cases
- Intensive inpatient rehabilitation: physiotherapy, OT, respiratory (cervical SCI), speech (C3–C4 level), psychology, bladder/bowel team
- Locomotor training — Body-weight supported treadmill training; harness-supported ambulation even for complete injuries stimulates neural plasticity
- Functional electrical stimulation (FES) — Activates paralysed muscles; improves hand function (upper limb) and ambulation potential
- Community reintegration — Vocational rehabilitation, home modifications, adaptive equipment prescription
- Epidural electrical stimulation (EES) — Epidural spinal cord stimulation enabling voluntary movement in complete SCI (Mayo Clinic, Nature Medicine 2023); experimental but rapidly advancing
- Cell therapy — Mesenchymal stem cells, olfactory ensheathing cells in trials; no current standard use
- Riluzole — Sodium channel blocker; Phase II trial (NACTN) suggests neuroprotection for cervical SCI; not yet standard
- Mindfulness / psychological support — Depression in 30–40% of SCI patients; CBT and mindfulness significantly improve quality of life and function
References — SCI
- STASCIS Fehlings MG et al. Early vs Delayed Decompression for Traumatic Cervical SCI. PLoS ONE 2012;7:e32037
- Cleveland Clinic Spinal Cord Injury. my.clevelandclinic.org
- Nature Med 2023 Capogrosso M et al. Epidural electrical stimulation restores motor control in SCI. Nature Medicine 2023