Cervical disc herniation

Disease Description (Causes and Symptoms)

• Definition and pathophysiology: Cervical disc herniation (cervical HIVD, “neck disc”) is a condition in which the nucleus pulposus of an intervertebral disc pushes through the annulus fibrosus and protrudes backward, compressing an adjacent nerve root (or, rarely, the spinal cord) and causing pain, sensory abnormalities, and motor weakness. The main causes are degenerative changes (decreased water content of the nucleus pulposus → reduced elasticity), trauma, and repetitive mechanical stress.
• Main causes: Age-related degenerative changes, poor posture (prolonged forward-bent posture), traffic accidents and impacts, lifting heavy objects, etc.
• Main symptoms:
  • Local symptoms: Neck pain, limited cervical range of motion
  • Radiating pain (nerve root compression): Pain extending into the shoulder, arm, hand, or fingers
  • Sensory abnormalities: Tingling (electric-shock sensation), reduced sensation
  • Motor symptoms: Reduced muscle strength (dropping objects, difficulty raising the arm)
  • In severe cases, spinal cord compression (cervical myelopathy): Gait disturbance, impaired fine motor movements of the hands (difficulty gripping objects), intrinsic hand muscle atrophy, and, in severe cases, bladder or bowel dysfunction
• Features by nerve root level (examples):
  • C5: Reduced shoulder strength (deltoid)
  • C6: Impaired wrist extension and abnormal sensation in the thumb
  • C7: Weakness of elbow extension (triceps), abnormal sensation in the middle finger
  • C8: Reduced sensation on the medial side of the fingers and hand, and impaired pinching function

Treatment Methods and Precautions

• Conservative treatment (generally preferred initially for early-stage and mild cases)
  • Rest and activity modification: Limit excessive neck movement and lifting heavy objects; use an appropriate pillow
  • Medications: NSAIDs, antipyretic analgesics, muscle relaxants, medications for neuropathic pain (gabapentin and pregabalin), and short-term opioids when necessary
  • Short-term oral corticosteroids (selectively)
  • Physical therapy: Heat therapy, ultrasound, electrotherapy, stretching, and strengthening exercises (neck and scapular stabilization exercises)
  • Epidural or nerve root block (steroid injection): When there is no improvement with conservative treatment or pain relief is needed
  • Neck brace (cervical collar): Short-term use is recommended (long-term use can cause muscle weakness)
• Surgical treatment (considered in the following cases)
  • When severe pain makes daily life impossible despite appropriate conservative treatment for more than 6 weeks
  • Progressive muscle weakness, severe sensory paralysis, gait disturbance, or symptoms of myelopathy (urgent surgery may be considered)
  • Examples of surgical procedures:
    • Anterior cervical discectomy and fusion (ACDF)
    • Artificial disc replacement (only when indicated)
    • Posterior cervical nerve decompression/foraminotomy (when nerve root compression is confined to the posterior region)
    • Posterior decompression and fusion (extensive spinal cord compression, multilevel lesions, etc.)
• Complications and postoperative considerations
  • During conservative treatment: Chronic pain and persistent neurological symptoms
  • After surgery: Infection, bleeding, nerve damage, dysphagia/voice changes (with an anterior approach), failed fusion, and adjacent segment disease
• Lifestyle management and precautions
  • Quit smoking (to help prevent accelerated disc degeneration), manage weight, maintain proper posture (adjust chair and monitor height), and perform regular neck and scapular strengthening exercises
  • If you are taking anticoagulants, be sure to consult your doctor about whether they should be stopped before a procedure or surgery
  • Acute progressive weakness, paralysis of the limbs, bladder dysfunction, and similar symptoms require immediate emergency medical attention

Outpatient Visit Checklist (Items to Bring and Example Questions)

• Items and documents to bring
  • A list of current medications (including doses and times of administration) and a history of allergies
  • Previous test results (the original images or CD of a recent MRI, CT, or plain X-ray, if available)
  • A history of previous treatments and procedures (nerve blocks, surgery, etc.) and images and medical records (if possible)
  • Notes recording when the symptoms began and how they have progressed (when they started and patterns of worsening or improvement)
  • A pain diary for assessing pain severity (pain intensity and aggravating or relieving factors)
• Information to prepare when explaining your symptoms to the doctor during the outpatient visit
  • The location and radiation pattern of the pain (which fingers or which part of the arm it travels down)
  • Sensory abnormalities (tingling or numbness) and muscle weakness (which movements are difficult)
  • Limitations in daily life (walking, work-related activities, etc.)
  • Whether there has been any recent accident or trauma
• Key examinations the doctor may consider during the outpatient visit
  • Physical examination (neurological examination: sensation, muscle strength, and reflexes)
  • Imaging tests (MRI is the most important), and CT/EMG (electromyography) if necessary

Examples of General Questions to Ask the Doctor

• How severe is the compression of the nerve or spinal cord on this MRI (or imaging study)?
• In my case, how long should I wait while trying conservative treatment? When would you recommend surgery?
• What are the main side effects of the recommended medications? Is it safe to take them long term?
• How long do the effects of injection treatment (epidural or nerve root block) last, and what are its side effects?
• If I have surgery, what is the expected recovery period, and approximately when could I return to work?

Examples of Disease-Specific Questions

• The MRI findings clearly show nerve root compression (which level among C5–C8); do my main symptoms (for example, loss of strength in the fingers) correspond to the compressed nerve root? How likely is improvement with conservative treatment?
• If surgery is recommended, among the available surgical options (ACDF vs. posterior decompression vs. artificial disc replacement), which is most appropriate for my case, and why? What complications can be expected?

(Note: The information above is general medical information. Individual diagnosis and treatment plans may vary depending on the examination by the treating doctor and the imaging findings.)