What is the recommended next step for a patient with a CT showing a broad-based central osteophyte complex or disc extrusion at C5–C6 causing mild cord migration and moderate cervical spinal canal stenosis?

MRI of the Cervical Spine Without Contrast is the Next Step

You should obtain an MRI of the cervical spine without contrast to fully characterize the degree of spinal cord compression, assess for cord signal changes, and guide treatment decisions. CT imaging is inadequate for evaluating soft tissue pathology including spinal cord injury, disc herniation extent, and ligamentous structures that are critical for surgical planning 1.

Why MRI is Essential After CT Findings

CT is significantly inferior to MRI for identifying soft-tissue pathologies including spinal cord contusion, epidural hematoma, and the full extent of disc herniation that can cause neurologic deficits and require surgical intervention 1. Your CT shows moderate spinal canal stenosis with cord migration—this represents potential cord compression that requires detailed soft tissue evaluation that only MRI can provide 1.

Key Information MRI Will Provide

• Degree and extent of spinal cord compression to determine surgical candidacy and approach 1
• Spinal cord signal changes on T2-weighted imaging, which predict surgical outcomes—multisegmental high signal changes or T1 hypointensity combined with T2 hyperintensity indicate worse prognosis 1
• Disc herniation versus osteophyte contribution to compression, which influences surgical technique 1
• Transverse spinal cord area and cord atrophy, as restricted cord area portends poor surgical prognosis 1
• Discoligamentous complex integrity if surgical intervention is being considered 1

Clinical Assessment Determines Urgency

Assess for Myelopathic Signs Immediately

You must perform a focused neurological examination looking for:

• Hand dexterity impairment (difficulty with buttons, writing, dropping objects) 2
• Gait instability and balance problems 2
• Upper motor neuron signs: hyperreflexia, Hoffmann's sign, Babinski sign, clonus 2
• Sensory deficits in hands or lower extremities 2
• Bowel or bladder dysfunction (indicates severe myelopathy) 2

Treatment Algorithm Based on Severity

If moderate-to-severe myelopathy is present (modified Japanese Orthopaedic Association score ≤12):

• Surgical decompression is recommended with benefits maintained 5-15 years postoperatively 1, 3
• Refer urgently to spine surgery 2, 3

If mild myelopathy is present (mJOA score >12):

• Either surgical decompression or supervised structured rehabilitation can be offered initially 1, 3
• If nonoperative management is chosen, surgical intervention is recommended if neurological deterioration occurs 3
• Close clinical follow-up is mandatory 3

If no myelopathy but radiculopathy is present:

• These patients are at higher risk of developing myelopathy and should be counseled about this risk 3
• Either surgical intervention or nonoperative treatment with close serial follow-up is suggested 3

If asymptomatic with only imaging findings:

• Prophylactic surgery is not recommended 3
• Counsel about potential risks of progression and educate about myelopathy signs 3
• Clinical follow-up is suggested 3

Critical Pitfalls to Avoid

Do not delay MRI if any myelopathic symptoms are present. Delayed diagnosis and treatment of cervical spondylotic myelopathy are associated with poorer outcomes and long-term disability 1, 2. The natural history of untreated moderate-to-severe myelopathy is progressive neurological deterioration 1.

Do not assume CT findings alone are sufficient for treatment planning. CT cannot visualize the spinal cord itself, cord edema, or the precise relationship between disc material and neural structures 1. Even when CT shows bony anatomy clearly, MRI frequently reveals additional pathology that changes surgical planning 1.

Be aware that "mild cord migration" on CT likely represents significant cord compression. The cord should not migrate at all—any displacement suggests substantial mass effect that requires MRI characterization 1.

Timing Considerations

MRI should be obtained promptly but does not require emergency acquisition unless progressive neurological deficits are present 1. If severe or rapidly progressive myelopathy develops, surgical decompression should ideally occur within 24 hours to improve long-term neurological recovery 1.

MRI is preferred over CT myelography because it is noninvasive, does not use ionizing radiation, provides better visualization of the spinal cord and soft tissues, and has 100% sensitivity for disc and ligament injuries 1. CT myelography should be reserved only for patients with MRI contraindications 1.