Appropriate Workup for Back Injury

Initial Clinical Assessment

The American College of Radiology recommends performing targeted history focusing on mechanism of injury, pain characteristics, neurological symptoms, and red flag indicators in patients with back injury 1, 2
Validated clinical screening criteria, such as NEXUS or Canadian C-Spine Rule (CCR) criteria, should be applied to determine the need for imaging in patients with cervical spine trauma 1, 2
For thoracolumbar injury, a low threshold for imaging should be maintained in high-energy trauma, elderly patients, or those with osseous demineralization 1

Severe or progressive neurological deficits require immediate advanced imaging, as recommended by the American College of Internal Medicine 3
Suspected cauda equina syndrome, characterized by urinary retention and saddle anesthesia, requires immediate MRI, according to the American College of Internal Medicine and other guidelines 3, 4
Suspected spinal infection, malignancy, or vertebral fracture in high-risk patients also require immediate advanced imaging, as recommended by the American College of Internal Medicine 3
Ankylosing spondylitis with trauma is a high-risk condition for unstable fractures, and CT imaging is recommended, according to the American College of Radiology 5, 6

The American College of Radiology recommends CT without contrast for suspected fracture from trauma, patients with ankylosing spondylitis with pain after trauma, and elderly patients with suspected vertebral fracture 1, 2, 7
MRI without contrast is indicated for suspected spinal cord or nerve root injury, disc herniation with persistent symptoms, and suspected cauda equina syndrome, as recommended by the American College of Radiology and other guidelines 2, 8, 4
Plain radiography has limited utility but may be appropriate for initial screening in low-risk scenarios and initial evaluation of possible vertebral compression fracture in selected higher-risk patients, according to the American College of Radiology and the American College of Internal Medicine 9, 3

The American College of Internal Medicine recommends avoiding unnecessary imaging in nonspecific back pain without red flags, as it does not improve outcomes and may lead to unnecessary interventions 3
Reformatted images from existing chest/abdomen/pelvis CT scans are effective and radiation-dose sparing for thoracolumbar trauma, as recommended by the American College of Radiology 8
The presence of a single vertebral fracture requires assessment of the entire spine due to the risk of noncontiguous fractures, according to the American College of Radiology 1
MRI findings should be correlated with clinical symptoms, as disc abnormalities are common in asymptomatic patients, as noted by the American College of Radiology and other guidelines 4

For patients over 65 years, the American College of Radiology recommends a lower threshold for imaging due to the lower sensitivity of standard NEXUS criteria 1
For children under 16 years, age-specific criteria should be applied, and radiographs are usually appropriate as initial imaging, according to the American College of Radiology 10
For patients with ankylosing spondylitis, a high suspicion for fracture should be maintained even with minor trauma, and multiplanar CT is necessary, as recommended by the American College of Radiology 5, 6

For patients with nonspecific back pain without red flags, imaging can be delayed for at least 1-2 months if symptoms persist, according to the American College of Internal Medicine 3
For patients with persistent radicular symptoms despite conservative therapy for 4-6 weeks, MRI should be considered to evaluate for disc herniation or spinal stenosis, as recommended by the American College of Internal Medicine 3