What are the typical X‑ray findings in cervical radiculopathy?

X-Ray Findings in Cervical Radiculopathy

Plain X-rays have limited diagnostic value in cervical radiculopathy and should not be used as the primary imaging modality, as they correlate poorly with clinical symptoms and electromyographic findings.

Primary Imaging Recommendation

• MRI of the cervical spine without IV contrast is the required imaging study to adequately evaluate nerve root compression and disc pathology that plain radiographs cannot reliably assess 1, 2.

• Plain X-rays are insufficient for diagnosis because radiographic findings (foraminal narrowing, disc space narrowing) correlate poorly with the severity of radiculopathy and EMG abnormalities 3.

Limited X-Ray Findings When Obtained

When plain radiographs are performed, the following degenerative changes may be visible but do not reliably predict symptomatic radiculopathy:

Static Lateral Views

• Disc space narrowing at affected levels, though this finding shows poor correlation with symptom severity 3.
• Foraminal narrowing on oblique views, but the extent of narrowing does not predict clinical severity or EMG abnormalities 3.
• Osteophyte formation at uncovertebral joints and facet joints 4.
• Loss of normal cervical lordosis, though this is a nonspecific finding 5.

Flexion-Extension Views

• Segmental instability may be detected on dynamic views, but there is no significant difference in instability patterns between radiculopathy and other cervical conditions 5.

Critical Clinical Pitfalls

• Do not proceed to treatment based on X-ray findings alone, as plain films may be an inadequate basis for diagnosing cervical radiculopathy 3.

• Radiographic abnormalities are frequently present in asymptomatic individuals, leading to a high false-positive rate that can mislead treatment decisions 2, 6.

• Clinical examination findings must take precedence over imaging when there is discordance between the symptomatic level identified clinically and the level showing degenerative changes on X-ray 2, 6.

Diagnostic Algorithm

1. Identify the dermatomal pain pattern and specific motor/sensory deficits clinically before ordering any imaging 2, 6.

2. Order MRI without contrast as the first-line imaging study when imaging is indicated, as it demonstrates 88% accuracy for surgically relevant lesions versus only 50% for CT 2.

3. Reserve plain X-rays for initial screening only when evaluating for gross instability, fracture, or alignment abnormalities—not for confirming radiculopathy 1.

4. Correlate all imaging findings with clinical examination, as the strongest concordance between clinical exam, EMG, and imaging occurs at C6 (70%), followed by C7 (67%) and C5 (50%) 2, 6.

When X-Rays May Be Considered

• Initial evaluation to exclude fracture, dislocation, or gross instability before proceeding to MRI 1.
• Assessment of overall cervical alignment as part of preoperative planning, but not for diagnosis 4.
• Postoperative evaluation of hardware and fusion in patients with prior cervical surgery 1.