Role of MRI and Clinical Examination in Diagnosing Cervical Radiculopathy

Limitations of MRI as a Stand‑alone Test

• MRI should not be used in isolation to diagnose symptomatic cervical radiculopathy; it must be interpreted together with clinical findings because of a high rate of false‑positive and false‑negative results – recommendation based on the American College of Radiology evidence. [1][2]

• Abnormal MRI levels frequently do not match the levels identified on clinical‑physical examination, indicating that imaging alone may mislead treatment decisions. This discrepancy is reported across multiple studies from the American College of Radiology. [3][4][5][6]

• MRI often shows positive findings in asymptomatic individuals, and such abnormalities are not reliably linked to acute symptom onset, underscoring the need for clinical correlation before attributing symptoms to imaging findings. Evidence drawn from American College of Radiology publications. [3][4][5][6]

Necessity of Clinical Examination Correlation

• A thorough clinical assessment—identifying dermatomal pain distribution and specific motor or sensory deficits—is essential for accurate localization of cervical radiculopathy, and serves as the primary step before ordering adjunctive studies. Guidance from the American College of Radiology. 1

• When clinical findings, EMG, and MRI are concordant, the highest agreement is observed for C6 radiculopathy (≈70% concordance), followed by C7 (≈67%) and C5 (≈50%) – this pattern highlights that clinical examination remains a critical anchor for interpretation of imaging and electrodiagnostic data. (Evidence from American College of Radiology; citation combined with clinical data). 1

• In cases where MRI shows multilevel foraminal stenosis but clinical examination points to a single symptomatic level, the clinical level should be prioritized, as imaging severity alone does not predict symptomatology. Consensus recommendation from the American College of Radiology. [3][4][5][6]

• Clinical motor weakness (e.g., strength ≤ 3/5) correlates more strongly with EMG abnormalities, reinforcing that objective neurological deficits improve the reliability of electrodiagnostic confirmation. Derived from American College of Radiology observations. 1

Strength of evidence: The cited statements are drawn from peer‑reviewed articles published by the American College of Radiology in 2025; the specific evidence grading was not provided in the source material.

Imaging Recommendations for Cervical Radiculopathy

Diagnostic Superiority of MRI

• The American College of Radiology (ACR) states that MRI of the cervical spine without IV contrast is required to adequately evaluate nerve‑root compression and soft‑tissue pathology that CT cannot reliably assess. 7
• According to ACR evidence, CT of the cervical spine is less sensitive than MRI for detecting nerve‑root compression, especially when disc herniation contributes to foraminal stenosis. [8][9]
• The ACR notes that MRI correctly predicts surgically relevant lesions in 88 % of cervical radiculopathy cases versus only 50 % for CT alone, underscoring its superior diagnostic accuracy for surgical planning. 7

Need for MRI Due to CT Limitations

• The radiologist’s recommendation (per ACR guidance) to obtain MRI is based on CT artifact limiting central assessment and the risk of missed disc pathology; moderate right C5‑C6 foraminal stenosis on CT correlates with the patient’s right‑sided C6 dermatomal symptoms. 8
• ACR guidelines caution against proceeding to surgery on the basis of CT findings alone because CT cannot reliably visualize soft‑tissue structures and may be compromised by artifact. [8][7]

MRI Protocol Without Contrast

• The ACR advises that a non‑contrast cervical spine MRI is the appropriate study; the addition of IV contrast provides no diagnostic benefit in the absence of red‑flag symptoms such as infection, malignancy, or inflammatory disease. [7][10]
• High‑resolution, non‑contrast MRI offers detailed assessment of disc abnormalities, nerve‑root compression, and uncovertebral joint pathology that are not adequately visualized on CT. 7

Assessment of Thoracic Findings

• ACR review of thoracic CT demonstrates no disc bulges, no significant stenosis, and only mild facet arthropathy, indicating that these findings do not explain the patient’s extensive T2‑T12 dermatomal symptoms. 8

Summary Table of Diagnostic Accuracy

Table reflects ACR‑cited comparative performance data. [7][8]