Rao (2007) — Degenerative cervical spondylosis: clinical syndromes, pathogenesis, and management.

Degenerative Cervical Spondylosis: Clinical Syndromes, Pathogenesis, and Management.

·J Bone Joint Surg Am·2007·133 citations·Spine

This 2007 AAOS Instructional Course Lecture by Rao et al. systematically reviews degenerative cervical spondylosis — its epidemiology, pathogenesis, diagnostic workup, and operative and nonoperative management — organized around three clinical syndromes: axial neck pain, cervical radiculopathy, and cervical myelopathy.

Key Findings

Radiographic disc degeneration is extremely common and largely asymptomatic — imaging only becomes meaningful once the patient is classified into a clinical syndrome
25% of adults under 40 affected
50% of adults over 40 affected
85% of adults over 60 affected
Three clinical syndromes can coexist simultaneously; missing myelopathy when radiculopathy dominates the presentation is the classic diagnostic error
Axial neck pain: 66% lifetime prevalence, 5% disabling at any time
Cervical radiculopathy: 83/100,000 annual incidence, peak in 6th decade
Cervical myelopathy: incidence underestimated due to subtle early findings
MRI intramedullary signal pattern predicts myelopathy recovery and should anchor the surgical consent conversation
T2 hyperintensity alone — edema or early gliosis, potentially reversible; better postoperative motor recovery
T1 hypointensity + T2 hyperintensity — myelomalacia, irreversible cord necrosis; significantly worse motor outcomes (p < 0.05)
A preoperative transverse spinal cord area of <0.45 cm² correlates with poor surgical outcomes, indicating exhausted cord reserve before the operation begins
ACDF produces good-to-excellent results in 70%–90% of radiculopathy patients, compared with complete resolution in only 43% at 10–25 years with nonoperative management alone
Anterior plating improves fusion rates in multilevel ACDF but adds no benefit for single-level ACDF with autograft; 3+ level corpectomy carries high failure rates even with plating and should prompt consideration of supplemental posterior fixation

Clinical Relevance

When evaluating a patient with cervical spondylosis, classify them into axial pain, radiculopathy, or myelopathy (or a combination) before selecting management — most improve with nonoperative treatment, but progressive myelopathy warrants surgery without delay, and MRI signal pattern (T2-only vs. T1+T2 changes) helps counsel patients on expected recovery.

Supplemental

Degenerative Cervical Spondylosis: Clinical Syndromes, Pathogenesis, and Management.

Rao, Eck, et al.·J Bone Joint Surg Am·2007·133 citations·Spine

Degenerative Cervical Spondylosis: Clinical Syndromes, Pathogenesis, and Management.

Key Findings

Clinical Relevance

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Degenerative Cervical Spondylosis: Clinical Syndromes, Pathogenesis, and Management.

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Degenerative Cervical Spondylosis: Clinical Syndromes, Pathogenesis, and Management.

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