Metastatic spinal cord compression

01OverviewDefinition, clinical context and the essential points that orientate the chapter.

Tumour in the vertebral body can weaken bone, extend through the posterior cortex into the epidural space and compress the cord or cauda equina. Direct paraspinal extension and less common intradural metastasis also occur. Venous congestion and oedema mean neurological decline may accelerate after a period of pain. Thoracic disease is frequent, but any level and more than one level may be involved. The clinical objective is recognition during the pain-only window before walking is lost.

NICE separates suspected spinal metastasis from suspected compression. In a patient with cancer, severe progressive, mechanical, nocturnal or radicular spinal pain triggers advice through the MSCC pathway and MRI within one week even without neurological findings. Add weakness, sensory loss, gait disturbance or sphincter change and the timeframe becomes an emergency MRI within 24 hours. Plain radiographs and bone scans cannot exclude epidural compression and should not be used as gatekeepers.

Treatment is a multidisciplinary decision rather than radiotherapy by default. Surgery may decompress and stabilise an operable mechanically unstable lesion, often followed by radiotherapy. Urgent radiotherapy is used when surgery is unsuitable and the tumour is responsive, with fractionation guided by oncology. Haematological malignancy may need a disease-specific pathway. Prognostic scores may inform but must not replace clinical judgement, patient priorities or assessment of the whole oncological trajectory.

Key points

Metastatic epidural disease most often spreads from a vertebral metastasis, causing collapse, instability and compression; prostate, breast, lung, kidney, thyroid and myeloma are important sources.
Pain is commonly the earliest feature: severe unremitting, progressive, night, mechanical or cough-and-strain pain, local tenderness or radicular pain in a person with cancer warrants urgent action.
Weakness, gait disturbance, limb numbness, a sensory level and bladder or bowel dysfunction indicate established neural compromise and should be reported as MSCC immediately.
NICE recommends whole-spine MRI within 24 hours for suspected MSCC, locally where possible; multiple non-contiguous vertebral lesions are common enough that one painful level is insufficient coverage.
Start dexamethasone 16 mg orally or an equivalent parenteral dose as soon as possible for neurological symptoms or signs, continuing 16 mg daily while surgery or radiotherapy is awaited.
If imaging rules out MSCC, stop dexamethasone unless another indication exists, tapering rather than stopping abruptly when clinically required after sustained exposure.
Immobilise without delay when neurological signs suggest instability, and consider it for moderate or severe movement-related pain; seek expert stability assessment within 24 hours to minimise unnecessary bed rest.
Definitive treatment is individualised surgery, radiotherapy or both, based on stability, neurological status, tumour biology, radiosensitivity, prognosis, prior treatment and patient goals.
Preserved mobility at treatment predicts function, so patients with suspicious pain but no deficit still need urgent cancer-team advice and MRI within one week for suspected spinal metastases.
Analgesia, thrombosis and pressure prevention, bladder and bowel care, rehabilitation, bone treatment, systemic anticancer planning and palliative support start alongside compression treatment.

02AetiologyUnderlying causes, associations and risk factors, with why each one matters.

Vertebral metastasis

Prostate, breast, lung, kidney, thyroid and other solid cancers commonly spread to vertebral marrow and extend posteriorly into the epidural space.

Haematological malignancy

Myeloma, lymphoma and other marrow cancers can infiltrate vertebrae or form epidural masses, sometimes before a solid-tumour history exists.

Direct paraspinal or intradural spread

A paraspinal tumour can extend directly into the canal, while less common intradural metastases compress neural tissue without first collapsing a vertebral body.

03PathophysiologyThe causal sequence from the underlying abnormality to symptoms and harm.

1
Vertebral seeding and expansion
Malignant cells establish within vertebral marrow or epidural tissue and progressively replace bone and occupy canal space.
2
Mechanical cord compression
Tumour, collapsed bone and instability deform the cord or cauda equina, often first producing local, mechanical or radicular pain.
3
Venous congestion and ischaemia
Rising epidural pressure impairs venous drainage and arterial perfusion, causing oedema, conduction failure and irreversible axonal loss.
4
Long-tract and autonomic failure
Continuing injury produces weakness, a sensory level, gait loss and bladder or bowel dysfunction below the compressed level.

04Clinical features and red flagsSymptoms, examination findings, patterns of presentation and time-critical warnings.

Pain-only warningRed flag

A patient with cancer develops severe progressive, unremitting or nocturnal spinal pain, pain worse on movement, coughing or straining, focal tenderness or new radicular pain before objective weakness appears.

Cord compressionRed flag

Gait becomes heavy or unsteady, legs weaken, reflexes become brisk, an extensor plantar or truncal sensory level appears and bladder or bowel control changes.

Cauda-equina involvementRed flag

Lumbar metastasis produces bilateral or progressive radicular symptoms, saddle sensory change, lower-motor-neurone weakness and impaired urinary flow sensation or retention.

Mechanical instabilityRed flag

Pain is markedly provoked by sitting, standing, turning or loading and relieved by lying, sometimes with collapse or deformity, indicating movement-related risk while transfer is planned.

Unknown primaryRed flag

Constitutional symptoms, focal spinal pain and cord signs may be the first presentation of cancer; emergency compression care continues while a tissue and staging strategy is developed.

Important mimics

Epidural abscess, haematoma, degenerative compression, myeloma-related collapse and benign fracture require imaging and cause-specific care; cancer history increases probability but does not prove metastasis.

05InvestigationsWhat to request, why it matters and how to interpret it.

Investigation order

Read from the initial assessment onwards. Tests may run in parallel in urgent care; first-line, preferred, confirmatory, definitive and gold-standard labels appear only when the chapter explicitly states them.

01
Whole-spine MRI within 24 hoursFirst step
Why
Confirm level and degree of neural compression, cord signal, epidural mass and additional vertebral metastases for treatment planning.
Interpretation and limitations
NICE specifies sagittal T1 or STIR and T2 of the whole spine with axial images through abnormalities. Radiology oversight and urgent reporting are required; use CT only when MRI is contraindicated.
02
Structured neurological and pain assessment
Why
Establish pretreatment function and identify progression while imaging or transfer is arranged.
Interpretation and limitations
Record walking status, segmental power, reflexes, sensory level, sacral and sphincter symptoms and whether pain is mechanical, radicular or unremitting. Repeat after any change.
03
Spinal stability assessment and CT
Why
Define osseous destruction, alignment and feasibility of stabilisation in addition to the neural MRI picture.
Interpretation and limitations
Use expert clinical and radiological assessment, with tools such as SINS as adjuncts rather than standalone decisions. CT helps surgical and radiotherapy planning.
04
Cancer staging and histology review
Why
Determine tumour biology, radiosensitivity, systemic options and prognosis without delaying urgent cord treatment.
Interpretation and limitations
Retrieve previous pathology and imaging. If the primary is unknown, select the safest high-yield biopsy site with oncology and radiology rather than biopsying a dangerously unstable level automatically.
05
Baseline bloods and steroid safety
Why
Prepare for contrast, surgery, radiotherapy and dexamethasone complications.
Interpretation and limitations
Check blood count, renal, liver and bone profile, calcium, coagulation, glucose, group and save and disease-specific markers where helpful. Abnormality should not postpone emergency MRI.
06
Prognostic and functional assessment
Why
Support proportionate decisions on surgery, radiotherapy, rehabilitation and goals of care.
Interpretation and limitations
Combine cancer trajectory, performance, frailty, neurological duration, comorbidity and patient wishes. Do not deny treatment from one scoring system alone.

06Differential diagnosisRealistic alternatives and the features that help distinguish them.

Benign mechanical pain or disc disease

Activity-related pain without cancer red flags may be degenerative, but progressive night pain, tenderness or neurological change warrants urgent oncological assessment.

Degenerative cervical myelopathy

Slow hand clumsiness and gait stiffness with concordant spondylosis support degenerative disease, while cancer pain and destructive vertebral imaging favour metastasis.

Spinal epidural abscess

Fever, bacteraemia, immune risk or a recent spinal procedure suggest infection; contrast imaging and cultures guide antimicrobial and surgical care.

Cauda-equina syndrome

Saddle sensory change and areflexic root weakness from lumbar disc disease can mimic lower metastatic compression; whole-spine imaging identifies level and multifocal disease.

07ManagementImmediate care, first-line treatment, alternatives and escalation.

01Neurological MSCCActivate the emergency pathwayFirst stepCancer is known or suspected and new weakness, gait, sensory or sphincter dysfunction suggests compression.

1Contact the designated MSCC service immediately, perform a timed neurological and stability assessment and immobilise when neurological signs or movement pain suggest instability.
2Start dexamethasone 16 mg orally or equivalent parenterally as soon as possible unless contraindicated, add glucose and gastric monitoring and arrange whole-spine MRI within 24 hours.
3Discuss imaging the same day with spinal surgery and oncology to choose decompression and stabilisation, urgent radiotherapy or a tumour-specific option and to avoid sequential referral delay.
4DefinitiveContinue pressure, thrombosis, bladder, bowel, analgesia, communication and rehabilitation care throughout transfer and definitive treatment.

02Suspicious painUse the pre-deficit windowA person with cancer has characteristic spinal pain but no objective cord or cauda-equina sign.

1Seek MSCC service advice within 24 hours, document the absence of neurological findings and provide explicit instructions for weakness, gait, saddle or bladder change.
2Arrange MRI within one week for suspected spinal metastasis and earlier if symptoms evolve, avoiding plain radiograph or bone scan as a substitute.
3Treat pain, assess stability and systemic disease and build an oncology plan for radiotherapy, surgery, ablation or bone-strengthening treatment according to findings.

03After MRIMatch definitive treatment to biology and stabilityDefinitiveMRI confirms malignant epidural compression and maps the full spinal burden.

1Determine mechanical instability, need for tissue, radiosensitivity, prior radiotherapy, expected survival, surgical fitness and the person's priorities in a joint spinal-oncology decision.
2Offer decompression and stabilisation when surgery can preserve or restore function and is proportionate, or urgent radiotherapy when surgery is unsuitable, according to NICE timing and fractionation advice.
3Taper steroid after surgery or at radiotherapy start as directed, then coordinate rehabilitation, systemic therapy, bone protection, thrombosis prevention and palliative symptom support.

Key medicines and prescribing safety4 treatments · regimens, roles and cautions

Reduces oedema and may preserve neurological function in MSCC with neurological symptoms or signs.

Dexamethasone

Give 16 mg orally or equivalent parenterally promptly, then 16 mg daily while definitive treatment is awaited.

Monitor glucose, infection, agitation, sleep, proximal weakness and gastrointestinal risk; give proton-pump cover and stop or taper appropriately if imaging excludes compression or after treatment begins.

Controls background, mechanical and radicular pain during immobilisation, imaging and oncological treatment.

Analgesia

Use individualised multimodal treatment with rapid access to opioid titration for severe malignant pain.

Avoid obscuring neurological review through over-sedation; prevent constipation, monitor delirium and renal function and add neuropathic treatment only for a clear component.

Reduces thrombosis risk from cancer, immobility, steroid and surgery.

Venous-thromboembolism prophylaxis

Use the locally indicated mechanical or pharmacological regimen after bleeding and operative plans are reviewed.

Coordinate timing with neuraxial procedures and surgery; thrombocytopenia, spinal bleeding risk and renal impairment may alter or temporarily preclude anticoagulation.

Reduces skeletal events in eligible metastatic disease and may complement local spinal treatment.

Bone-targeted treatment

Oncology selects zoledronic acid, denosumab or another agent using the cancer-specific licensed schedule.

Check calcium, vitamin D, renal function and dental health; hypocalcaemia and osteonecrosis of the jaw need prevention and monitoring.

08ComplicationsImportant consequences, why they occur and why they matter clinically.

Permanent paralysis

Delayed decompression permits irreversible cord infarction and axonal loss, leaving loss of walking and dependence despite later tumour control.

Bladder, bowel and sexual dysfunction

Autonomic pathway injury produces retention, incontinence, constipation and sexual impairment, with secondary infection and skin problems.

Instability and pathological fracture

Progressive vertebral destruction causes severe movement pain, deformity and collapse, risking further neural injury during ordinary transfers.

Immobility and systemic decline

Weakness and advanced cancer increase thrombosis, pressure injury, infection, deconditioning and palliative-care needs as neurological disability advances.

09Monitoring and follow-upTreatment response, safety checks and longer-term review.

Repeat walking status, power, reflexes, sensation, sacral and bladder or bowel symptoms during transfer and before and after surgery or radiotherapy.
Monitor pain with movement and stability instructions, reviewing immobilisation within 24 hours so avoidable bed rest does not add deconditioning and thrombosis.
Check capillary glucose, mental state, infection and gastric symptoms during dexamethasone and document the taper or discontinuation plan.
Follow bladder volume, bowel function, skin, pressure areas, nutrition, thrombosis and analgesic adverse effects from the first emergency assessment.
Review wound or radiotherapy toxicity, mobility, equipment and rehabilitation goals alongside the systemic anticancer plan and prognosis.
Provide named contact and emergency return instructions for increasing pain, new weakness, altered walking, saddle change or impaired urinary flow sensation.

10Special situationsVariants, exceptions and circumstances that change the usual approach.

Pain is the opportunity

Neurological recovery is best when treatment occurs before loss of walking, making a new mechanical or nocturnal pain pattern in cancer highly actionable.

Image the whole spine

A painful thoracic lesion does not exclude silent cervical or lumbar metastases that could change surgery, radiotherapy fields or stability advice.

Immobilisation is reviewed

Precautions protect an unstable spine, but prolonged indiscriminate flat bed rest adds harm; expert stability review should occur within a day.

Steroid follows indication

Neurological MSCC warrants prompt dexamethasone, whereas pain-only or suspected lymphoma and myeloma scenarios have more nuanced diagnostic and haematological considerations.

Surgery is not just decompression

Removal of epidural tumour without addressing mechanical instability may not solve movement pain or protect the spinal column.

Palliation and rehabilitation coexist

Even when prognosis is limited, regaining transfers, controlling pain and enabling preferred place of care are legitimate active treatment goals.

11Common pitfallsFrequent interpretation and management errors.

01
Reassuring a patient with cancer because severe nocturnal spinal pain occurs before weakness.
02
Requesting MRI of only the most painful spinal segment in suspected metastatic compression.
03
Waiting for a routine oncology appointment after gait, sensory or bladder change appears.
04
Using a normal plain radiograph or bone scan to exclude epidural disease.
05
Continuing dexamethasone indefinitely without glucose, infection, gastric and taper planning.
06
Choosing radiotherapy automatically without assessing mechanical instability and surgical fitness.