Cervical Spondylosis – General

Modern Study Review (AI-Generated)

High-Yield Summary

Cervical spondylosis is a common degenerative condition affecting the cervical spine, predominantly in patients over 40 years old. It manifests clinically with radiculopathy, myelopathy, or a combination, driven by disc degeneration, osteophyte formation, and ligamentous hypertrophy. Understanding the pathophysiology and age-related patterns of soft versus hard disc pathology is essential for diagnosis and management. Treatment focuses on symptom relief and preservation of neurological function, with surgical intervention reserved for progressive or severe myelopathy and intractable radiculopathy.

Key Diagnostic Findings

Anatomy

• Cervical motion segment includes 5 articulations: one intervertebral disc, two facet joints, and two uncovertebral joints.
• Degeneration affects all these structures, leading to loss of disc height, osteophyte formation, and ligamentous changes.

Clinical Presentation

• Radiculopathy: More common in patients <55 years, often due to soft disc herniation compressing nerve roots.
• Myelopathy: More common in patients >55 years, caused by canal stenosis from osteophytes, ligamentum flavum hypertrophy, and hard disc formation.
• Symptoms include neck pain, radicular arm pain, sensory changes, motor weakness, and signs of spinal cord dysfunction (e.g., gait disturbance, hand clumsiness).

Imaging

• MRI: Gold standard for evaluating soft disc herniation, spinal cord compression, and ligamentous hypertrophy.
• CT: Superior for visualizing bony osteophytes and foraminal stenosis.
• X-rays: Useful for assessing alignment, disc space narrowing, and osteophytes; dynamic flexion-extension views assess instability and dynamic canal changes.

Classification Systems

• No universally accepted classification specific to cervical spondylosis; however, clinical severity is often graded by myelopathy scales (e.g., Nurick, mJOA).
• Soft disc herniation types:

Current Gold Standard Treatment

Non-operative

• Indicated for mild radiculopathy or myelopathy without significant neurological deficit.
• Includes physical therapy, cervical immobilization, NSAIDs, neuropathic pain agents, and activity modification.
• Close monitoring for progression of myelopathy is critical.

Operative

• Indications:
• Progressive or moderate-to-severe cervical myelopathy.
• Intractable radiculopathy refractory to conservative care.
• Significant spinal cord compression with neurological deficit.
• Surgical options depend on pathology location and alignment:
• Anterior cervical discectomy and fusion (ACDF): Preferred for soft disc herniations and anterior osteophytes.
• Posterior decompression (laminoplasty or laminectomy): Used for multilevel stenosis or when lordosis is preserved.
• Foraminotomy: For isolated foraminal stenosis causing radiculopathy.
• Modern techniques emphasize motion preservation when possible (e.g., cervical disc arthroplasty).

Modern Complications & Outcomes

Complications

Outcomes

• Early surgical intervention in myelopathy improves neurological recovery and functional outcomes.
• Non-operative treatment can be effective for radiculopathy but requires vigilant follow-up.
• Long-term prognosis depends on severity at presentation and timely management.
• Preservation of cervical lordosis correlates with better outcomes and reduced adjacent segment degeneration.

Classic Clinical Notes

Cervical Spondylosis – General

• Degenerative changes are nearly universal in the spine; most patients are older than 40 on presentation.
• Neurologic picture may be from myelopathy (cord compression), radiculopathy (root compression), or both.

• Patients younger than 55 are more likely to have radiculopathy from soft disc herniation; those over 55 tend to get canal and foraminal stenosis from “hard disc” formation – osteophytes along facets and uncovertebral joints.

• Most common degeneration at C5-6; then at C6-7.

Pathophysiology

• 5 articulations: disc, 2 facets, 2 uncovertebral joints.
• The process starts with disc degeneration – dessication, loses water, then loses height. As the uncovertebral joints are brought into proximity, the collapse at the back is halted, and the collapse at the front leads to loss of lordosis.
• Eventually, facets and uncovertebral joints are degenerative causing osteophyte formation, ligamentum flavum hypertrophy, and annular disruption.

Soft Disc Herniation – 3 Types

1. Intraforaminal – most lateral – most common in young patients. The disc basically goes right out the uncovertebral joint; a C4-5 intraforaminal disc protrusion will get the C5 nerve root which passes above the C5 body.
2. Posterolateral – between the posterior edge of the uncinate process and the lateral edge of PLL.
3. Central – right through the PLL – seen in older patients when uncovertebral joint spurs act as barriers to posterolateral and intraforaminal herniation.

Hard Disc – more common in patients > 55 years old

• Uncovertebral osteophytes or posterolateral facet osteophytes pinch the nerve as it exits through the foramen.
• Osteophytes from the posterior vertebral margin can also cause cord compression.

Vascular Insufficiency

• Disc bulges and anterior spurs may compress the anterior spinal artery and its feeders – causing a vascular myelopathy.

Dynamic Compression

• Extension decreases the canal diameter.
• Flexion typically increases the canal diameter, but neural structures may be tethered across osteophytes.

Last Updated on January 25, 2026 by orthonet