Metastasis to the spine

What it is:

What Is Spinal Metastasis?

Spinal metastasis occurs when cancer cells from another part of the body spread to the spine. These are secondary tumors, and they can affect the vertebrae, spinal cord, or surrounding nerves, leading to pain, neurological deficits, and even paralysis. The spine is the third most common site for cancer metastasis after the lungs and liver.

Common Primary Cancers That Spread to the Spine

  • Lung cancer (31%)
  • Breast cancer (24%)
  • Prostate cancer (8%)
  • Gastrointestinal cancers (9%)
  • Kidney cancer (1%)
  • Melanoma (4%)
  • Lymphoma (6%)

Symptoms of Spinal Metastases

Symptoms depend on tumor location and severity:

  • Persistent back or neck pain (often worse at night)
  • Radicular pain: shooting pain down arms or legs
  • Numbness, tingling, or weakness in limbs
  • Loss of bladder or bowel control
  • Difficulty walking or standing
  • Spinal deformities or fractures
  • Paralysis in severe cases

Causes and Risk Factors

Cancer cells spread to the spine via:

  • Bloodstream or lymphatic system
  • Direct invasion from nearby tissues
  • Retrograde venous flow

Risk factors include:

  • Advanced cancer stage
  • Age (40–70 years)
  • Male gender
  • History of aggressive cancers

Diagnosis

Diagnosis involves:

  • MRI (gold standard for spinal cord and nerve visualization)
  • CT scans (bone structure assessment)
  • PET scans (systemic disease evaluation)
  • Biopsy (to confirm tumor type)

Treatment Options

Treatment is often multimodal, combining therapies to relieve symptoms and improve quality of life:

1. Medications

  • Steroids (e.g., dexamethasone) to reduce swelling
  • Pain management
  • Anti-seizure drugs if needed

2. Radiation Therapy

  • Stereotactic radiosurgery (SRS) for precise targeting
  • Whole-spine radiation for multiple lesions

3. Surgery

  • Decompression surgery to relieve spinal cord pressure
  • Vertebroplasty to stabilize fractured vertebrae
  • Separation surgery followed by SRS for advanced cases

4. Systemic Therapies

  • Chemotherapy
  • Targeted therapy
  • Immunotherapy (depending on cancer type)

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