Rheumatoid Arthritis and the Spine — Surgical Management

Dr. Zeeshan Sardar, MD, MSc, F.R.C.S.C
Co-Chief of Spinal Deformity Surgery • Director, Quality & Patient Safety • Medical Director, Spine Unit
Och Spine Hospital at NewYork-Presbyterian / Columbia University • New York, NY

Rheumatoid arthritis is widely understood as a joint disease of the hands and knees. What is far less widely known — including among many patients who have lived with rheumatoid arthritis for years — is that the cervical spine is affected in a significant proportion of patients, and the consequences can be among the most serious the disease produces. Atlantoaxial instability, cranial settling, and subaxial subluxation can cause progressive spinal cord compression that requires surgical evaluation and, in many cases, surgical treatment.

These conditions develop insidiously, their symptoms are often attributed to the rheumatoid disease itself rather than to spinal cord involvement, and the window for surgical intervention to prevent permanent neurological injury can close before the correct diagnosis is made. This page is intended to help patients, families, and referring clinicians understand when rheumatoid spine involvement warrants surgical evaluation — and what that evaluation and treatment involves.

HOW RHEUMATOID ARTHRITIS AFFECTS THE SPINE

Rheumatoid arthritis causes synovial inflammation throughout the body. In the cervical spine, the synovial joints — particularly the extraordinarily concentrated collection of synovial tissue at C1–C2 and the craniocervical junction — are vulnerable to the same destructive pannus formation and ligamentous laxity that affect peripheral joints. Rheumatoid cervical spine involvement produces three distinct patterns:

1. Atlantoaxial Instability (AAI)

The transverse ligament holds the odontoid process of C2 in close contact with the anterior ring of C1. In rheumatoid arthritis, synovial inflammation erodes and stretches this ligament — and can erode the odontoid itself — allowing abnormal forward translation of C1 on C2 with neck flexion.

The critical measurements are the atlanto-dens interval (ADI) — greater than 9 to 10 mm indicates severe instability placing the cord at serious risk — and the space available for the cord (SAC) — below 13 mm, neurological injury risk rises significantly. These are the thresholds that generally trigger surgical evaluation even in neurologically intact patients.

2. Cranial Settling (Basilar Invagination)

Pannus formation and bony erosion at C1–C2 can allow the odontoid to migrate upward toward the foramen magnum, compressing the brainstem directly. This is among the most dangerous patterns of rheumatoid spine involvement because brainstem compression produces a more severe neurological picture than cervical cord compression, and because standard neutral-position X-rays significantly underestimate its degree.

3. Subaxial Subluxation

Below C2, rheumatoid arthritis causes progressive disc and facet joint destruction throughout the subaxial cervical spine (C3–C7), producing a step-ladder pattern of vertebral slipping that compresses nerve roots and the spinal cord. In severe cases, multilevel subaxial instability coexists with atlantoaxial instability, requiring comprehensive reconstruction from the occiput or upper cervical spine through the mid or lower cervical levels.

WHY DIAGNOSIS IS OFTEN DELAYED

  • Symptoms overlap with rheumatoid disease itself. Fatigue, weakness, and reduced walking tolerance are common rheumatoid symptoms. Myelopathic symptoms — hand clumsiness, gait instability, difficulty with fine motor tasks — are often attributed to the arthritis rather than to spinal cord compression.
  • Neutral X-rays underestimate instability. Atlantoaxial instability is dynamic — it worsens with neck flexion and may be invisible on a neutral lateral film. Flexion-extension X-rays are essential, and MRI is required to assess cord signal and the degree of pannus encroachment on the canal.
  • Neurological deficits develop insidiously. Patients often compensate unconsciously, holding their head in a position that reduces cord compression, until a sudden movement or fall produces acute worsening. By that point, neurological recovery is less certain than if surgery had been performed prophylactically.

WHEN TO SEEK SURGICAL EVALUATION

Patients with rheumatoid arthritis should prompt spine evaluation if they develop:

  • New or progressive weakness or clumsiness of the hands, particularly with fine motor tasks (buttoning, writing, handling small objects)
  • Gait instability, balance problems, or a feeling of heavy legs not explained by joint involvement
  • Lhermitte’s sign — an electric shock sensation running into the arms or legs with neck flexion
  • Occipital headache or pain radiating from the skull base upward — characteristic of C2 nerve root compression from C1–C2 instability
  • New bladder or bowel changes without another clear explanation
  • Any sudden neurological event following neck flexion, extension, or a fall

Even without overt neurological symptoms, imaging-documented atlantoaxial instability with ADI greater than 9 mm or SAC less than 13 mm is generally considered an indication for surgical evaluation — the neurological risk in this range is high enough that waiting for deficits to progress is not the appropriate standard of care.

SURGICAL OPTIONS

C1–C2 Fusion

For isolated atlantoaxial instability without cranial settling, posterior C1–C2 fusion is the standard treatment. The Harms technique — polyaxial screws into the C1 lateral masses and C2 pedicles connected by rods — provides rigid fixation with a high fusion rate and has become the preferred technique at high-volume centers. The procedure eliminates rotation at C1–C2 (responsible for approximately 50 percent of cervical rotation) but preserves subaxial motion, and most patients adapt well to the rotational limitation.

For reducible subluxation, posterior fusion alone is sufficient. For irreducible instability with pannus, stabilization alone often allows the inflammatory pannus to resorb over months as the mechanical stimulus driving it is eliminated, without requiring a separate anterior decompression.

Occipitocervical Fusion

When cranial settling is present, the fusion construct must extend from the occiput down through the affected cervical levels. Occipitocervical fusion requires careful attention to craniocervical alignment to avoid postoperative dysphagia or difficulty looking downward. Robotic navigation and intraoperative neuromonitoring are essential given the proximity to the brainstem and vertebral arteries. For patients requiring decompression of the brainstem, transoral or endoscopic transnasal odontoidectomy may precede the posterior fusion in a staged approach.

Subaxial Decompression and Fusion

For subaxial subluxation causing nerve root or cord compression, posterior cervical laminectomy and fusion (PCLF) is frequently the appropriate procedure, providing multilevel decompression while stabilizing the compromised segments. In patients with combined atlantoaxial and subaxial disease, comprehensive reconstruction from the upper cervical spine or occiput through the lower cervical levels may be required in a single staged procedure.

COORDINATED PERIOPERATIVE CARE

  • Immunosuppressive medication management. Decisions about holding or continuing DMARDs and biologics perioperatively are made in direct coordination with the rheumatologist. Methotrexate is generally continued; many biologics are held for one dosing interval before surgery and resumed once wound healing is confirmed. These decisions are individualized, not based on a generic protocol.
  • Bone density assessment. Long-term corticosteroid use accelerates bone loss. Patients with significant osteoporosis require augmented fixation strategies and potentially preoperative bone-building therapy. Bone density evaluation is a standard part of surgical planning for this population.
  • Airway management. Atlantoaxial instability creates significant risk during anesthetic intubation — particularly with neck extension during direct laryngoscopy. Awake fiberoptic intubation is typically the safest approach for patients with significant C1–C2 instability or cranial settling, and the anesthesia team must be fully briefed on the degree and direction of instability before induction.
  • Rheumatology co-management. At NewYork-Presbyterian / Columbia University, rheumatology and spine surgery are under the same roof. This integrated approach — available at a full academic medical center — allows preoperative optimization, perioperative medication management, and postoperative care to be coordinated directly rather than requiring the patient to manage communication between separate practices.

FREQUENTLY ASKED QUESTIONS

I have rheumatoid arthritis and neck pain. Do I need a spine evaluation?

Neck pain alone in rheumatoid arthritis is common and does not automatically require surgical evaluation. However, neck pain accompanied by any neurological symptoms — arm weakness, hand clumsiness, gait changes, balance problems, or Lhermitte’s sign — warrants evaluation with flexion-extension X-rays and MRI, even if symptoms seem mild. Early evaluation consistently produces better neurological outcomes than waiting for significant deficits to develop.

Can better disease control prevent the need for spine surgery?

Effective DMARD and biologic therapy has significantly reduced the rate of cervical spine involvement in rheumatoid arthritis compared to the pre-biologic era. However, for patients with established instability, medical therapy alone cannot restore structural integrity to eroded ligaments and bone — it can only slow further progression. Once significant instability is present, surgical evaluation is appropriate.

Will I lose neck motion after C1–C2 fusion?

Yes. C1–C2 is responsible for approximately 50 percent of normal neck rotation, which is eliminated after fusion. Most patients adapt well over time, and the remaining subaxial cervical spine continues to provide meaningful range of motion. This limitation is accepted as the necessary trade-off for eliminating the neurological risk of an unstable C1–C2 joint.

What is the surgical risk in patients with active rheumatoid arthritis?

Surgical risk is higher than in the general spine population because of bone quality issues, immunosuppression-related infection risk, and airway complexity. These risks are managed — not eliminated — through preoperative optimization and rheumatology coordination. The neurological risk of not operating, when significant myelopathy or instability is present, is typically greater than the surgical risk.

Should my rheumatologist and spine surgeon communicate directly?

Yes — this is essential. Perioperative immunosuppressive management requires direct team-to-team communication. At NewYork-Presbyterian, rheumatology and spine surgery are both in-house, allowing this coordination to happen as part of the routine surgical planning process.

Is this a good condition for a second opinion?

Yes. Rheumatoid cervical spine reconstruction is among the more complex and higher-stakes procedures in spine surgery. A second opinion from a surgeon with specific upper cervical reconstruction experience is appropriate and encouraged before committing to surgery.

RELATED CONDITIONS & PROCEDURES

About Dr. Zeeshan Sardar
Dr. Sardar is Co-Chief of Spinal Deformity Surgery at NewYork-Presbyterian / Columbia University and evaluates patients with rheumatoid cervical spine involvement for surgical and non-surgical management in close collaboration with the rheumatology team. To schedule a consultation or request a second opinion, call 212-932-5187 or visit the contact page. Telemedicine available in NY, NJ, CT, FL, PA, MO, CA, and TX.

This page is for educational purposes only and does not constitute individualized medical advice. Please consult a qualified spine specialist to discuss your specific condition.

Reviewed by Dr. Zeeshan Sardar, MD, MSc, F.R.C.S.C — Last reviewed: July 2026.