Posterior Cervical Decompression & Fusion

What it is

Posterior cervical decompression and fusion is an open procedure in which the surgeon approaches the cervical spine through the back of the neck to relieve pressure on the spinal cord and nerve roots, then stabilizes the treated vertebral segments with instrumentation and bone graft.

Decompression is achieved by removing the laminae, the bony arches at the back of each vertebra, across the affected levels (laminectomy), which directly enlarges the spinal canal. In selected cases a laminoplasty technique is used instead: one side of the lamina is hinged open rather than removed, preserving more of the posterior bone. Bone spurs or thickened ligament narrowing the nerve exit channels can be trimmed at the same time.

After decompression, fusion stabilizes the spine. Screws placed into the lateral masses (the bony columns flanking each vertebra) or into the pedicles at certain levels are connected with metal rods that span the treated segments. Bone graft, taken from the patient's own pelvis or from processed donor bone, is laid across the posterior elements to stimulate bone growth and eventually consolidate the treated levels into a solid construct.

This approach is distinct from anterior procedures such as anterior cervical discectomy and fusion. Because it directly targets the back of the spinal canal, it is particularly suited to multi-level disease and to conditions such as OPLL where the primary compression lies behind the vertebral bodies.

Who it helps

Posterior cervical decompression and fusion is considered for patients with conditions that cause significant spinal canal narrowing at multiple levels or that are not well addressed through an anterior approach alone.

Cervical myelopathy is the most common indication. Myelopathy occurs when the spinal cord itself is compressed, producing symptoms such as hand clumsiness, difficulty with fine motor tasks, an unsteady or wide-based gait, arm or leg weakness, and, in severe cases, changes in bladder control. When cord function is declining, prompt evaluation and often timely surgery are important to halt progression, as prolonged compression can lead to irreversible changes in the cord.

Ossification of the posterior longitudinal ligament (OPLL) is a condition in which a ligament running behind the vertebral bodies hardens and calcifies, progressively narrowing the canal. When OPLL is extensive or spans several levels, posterior decompression is frequently the preferred surgical strategy.

Multi-level cervical stenosis from degenerative spondylosis (involving bone spurs, disc-space collapse, and thickened ligament across three or more segments) can narrow the canal sufficiently to compress the cord or nerve roots at several points simultaneously. Posterior decompression addresses all involved levels in a single approach.

Surgery is considered after non-operative measures have been appropriately tried, or sooner when imaging shows significant cord signal change or when neurological function is actively worsening. A thorough discussion of the risks and expected benefits specific to your situation is an essential part of the decision-making process.

How it's performed

The procedure is performed under general anesthesia. The patient is positioned face-down on a specialized surgical table, and the head is held securely in a neutral or slightly flexed position using a head holder or skull-pin fixation. Correct alignment is confirmed before the incision is made.

A midline incision is made along the back of the neck over the affected levels. The paraspinal muscles are carefully separated from the bone on each side and retracted to expose the posterior elements of the targeted vertebrae.

Decompression begins at the compressed levels. In a laminectomy, the laminae are removed to open the spinal canal and allow the cord to shift away from the remaining compression at the front, widening the canal without disturbing the front of the spine. (Laminoplasty, in which one side of each lamina is scored as a hinge and swung open like a door and held with small implants rather than removed, is a separate, motion-preserving alternative to laminectomy and fusion; it generally does not use screws and rods, so it is not part of the fusion procedure described here.) If individual nerve roots are also compressed at their exit channels, a foraminotomy can be performed at the same time.

For the fusion component, screws are placed bilaterally into the lateral masses of the cervical vertebrae across the treated levels, and at the top or bottom of the construct into the pedicles if greater fixation strength is needed. Connecting rods are secured to the screws to hold the segments in alignment. Bone graft is then laid along the prepared bone surfaces to initiate the biological fusion process.

Continuous intraoperative neurophysiological monitoring, tracking electrical signals traveling through the spinal cord and peripheral nerves, is typically used throughout the procedure to help detect any change in nerve function in real time.

Operative time varies with the number of levels being treated and the complexity of the decompression, and may range from two to four hours or more.

Recovery

Most patients remain in hospital for two to four days after surgery, during which pain is managed, early mobilization is encouraged, and the care team monitors neurological function.

A cervical collar is typically worn for several weeks following discharge to protect the fusion while early healing progresses. The specific collar type and duration depend on the number of levels fused and Dr. Telemi's post-operative protocol.

Neck soreness and stiffness are expected in the early weeks. Neurological recovery, such as improvement in hand function or walking, follows its own timeline and may continue gradually for months. How much function returns, and how quickly, depends on the severity and duration of cord or nerve compression before surgery.

Light activity at home can generally begin within a few weeks. Driving, returning to desk work, and resuming heavier physical activity each follow progressive milestones; your surgeon will guide timing based on your progress and imaging. Physical therapy is typically introduced once the fusion has had adequate time to begin consolidating, focusing on restoring neck strength, posture, and functional movement.

Radiographic fusion, visible bone bridging across the treated levels, typically matures over a period of three to twelve months and is assessed with follow-up imaging.

Risks & considerations

As with any spine surgery, posterior cervical fusion carries both general surgical risks and procedure-specific considerations. No surgery is without risk, and outcomes cannot be guaranteed.

C5 nerve palsy is a recognized complication specific to cervical laminectomy and fusion. It presents as new deltoid (shoulder) weakness on one or both sides after surgery, usually appearing within a few days. The exact cause is not fully understood and relates to nerve root tethering as the cord shifts backward after decompression. Most cases resolve over weeks to months with conservative management, though recovery is not universal.

CSF leak may occur if the dura, the membrane surrounding the spinal cord, is inadvertently entered. Small leaks are often repaired during surgery; some require additional treatment or prolonged positioning after the operation.

Hardware complications, including screw loosening, rod breakage, or pseudarthrosis (failure of the bone graft to fuse), can occur. These may require revision surgery if symptomatic or if alignment is lost.

Adjacent segment degeneration refers to accelerated wear at the levels immediately above or below a fusion over the long term, resulting from altered load distribution. This may eventually require further treatment.

Wound infection, superficial or deep, is uncommon but possible with any open procedure. Patients with diabetes, obesity, or immunosuppression carry a modestly higher risk.

Neurological injury, including worsening of pre-existing deficits or new weakness, is rare but possible. Intraoperative monitoring and careful surgical technique are used to reduce this risk.

Incomplete neurological recovery is an important realistic expectation in patients undergoing surgery for myelopathy. Surgery is intended to halt disease progression and may result in meaningful functional improvement, but the degree of recovery from pre-existing cord injury is variable and depends on factors that cannot be fully predicted before the operation.

The decision to proceed involves an individualized assessment of your imaging, neurological status, overall health, and personal goals. Dr. Telemi reviews all of these factors carefully before recommending a surgical approach.