What imaging should be ordered for a patient with possible cervical spine injury after a fall and accompanying thoracic pain?

Imaging for Possible Cervical Spine Injury After Fall with Thoracic Pain

Order CT cervical spine without IV contrast as the initial imaging study, and CT thoracic spine without IV contrast to evaluate the thoracic pain. CT is the gold standard for identifying cervical and thoracic spine fractures and significantly outperforms plain radiographs 1.

Cervical Spine Imaging Approach

Initial Decision: Does the Patient Need Imaging?

First, apply clinical decision rules to determine if imaging is warranted:

• NEXUS criteria (if ANY are present, imaging is indicated):

  • Midline cervical tenderness
  • Altered mental status
  • Intoxication
  • Neurologic deficit
  • Painful distracting injury

• Canadian C-Spine Rule has similar high sensitivity (100%) for detecting cervical spine injury 1

If the patient meets either NEXUS or CCR criteria (which a fall with cervical spine concern likely does), proceed directly to CT imaging 1, 2.

Why CT Over Plain X-rays?

CT detects approximately 3 times more fractures than plain radiographs - radiographs identify only about one-third of fractures visible on CT 1. This makes plain radiographs obsolete for initial trauma evaluation 1.

If plain radiographs were ordered (minimum 3 views: AP, lateral, open-mouth odontoid), they would miss critical injuries and require subsequent CT anyway 1.

When to Add MRI

Do NOT routinely add MRI after a normal CT in patients without neurologic symptoms 1, 2. However, MRI becomes indicated if:

• Neurologic deficits are present (weakness, numbness, cord symptoms)
• Persistent neck pain despite negative CT - MRI identifies soft-tissue injuries in 5-24% of patients with negative CT, though <1% require surgical intervention 1
• Patient remains obtunded/unexaminable - though recent evidence suggests CT alone may be sufficient for collar removal in this scenario 2

The ReCONECT trial found MRI abnormalities in 23.6% of patients with negative CT who had persistent neck pain, including ligamentous injuries (16.6%), but the clinical significance was often unclear 1.

Thoracic Spine Imaging

Order CT thoracic spine without IV contrast for the thoracic pain evaluation. Key considerations:

• 20% of patients with spine trauma have injuries at non-contiguous levels 1, making thoracic imaging essential when cervical injury is suspected
• CT has 94-100% sensitivity for thoracolumbar fractures versus only 49-62% for plain radiographs 2
• CT reconstructions can be performed from chest CT if already obtained for other trauma indications, avoiding additional radiation 1

Thoracic Imaging Indications

Image the thoracic spine if ANY of these are present 1:

• Midline thoracic tenderness
• High-risk mechanism of injury
• Age >60 years with mechanism consistent with injury
• Altered consciousness, intoxication, or distracting injury (making exam unreliable)

Common Pitfalls to Avoid

1. Don't order plain radiographs first - they will miss injuries and delay definitive imaging 1

2. Don't add flexion-extension views - they rarely demonstrate instability not seen on standard views and are often inadequate 1

3. Don't routinely order MRI after normal CT unless neurologic symptoms exist - this prolongs collar time, ICU stays, and increases morbidity without improving outcomes 2

4. Don't forget to image the cervicothoracic junction - ensure CT coverage extends to T1 as this area is frequently inadequately visualized 1

5. Don't use IV contrast - it adds no value for detecting spine fractures and can obscure subtle injuries 1

Summary Algorithm

1. Patient with fall + possible cervical injury + thoracic pain
2. Apply NEXUS/CCR criteria → If positive (likely in this scenario)
3. Order: CT cervical spine without contrast + CT thoracic spine without contrast
4. If CT shows fracture or instability → Neurosurgery/Orthopedic spine consultation
5. If CT normal but neurologic deficits present → Add MRI cervical/thoracic spine
6. If CT normal, no neurologic deficits, but persistent pain → Consider MRI (though most findings won't change management) 1, 2

The evidence strongly supports CT as first-line imaging with selective MRI use based on clinical findings, not routine protocols 1, 2.