Which imaging is most appropriate to evaluate disc herniation with cord compression or cauda equina symptoms?

Which imaging is most appropriate to evaluate disc herniation with cord compression or cauda equina symptoms?

• A. Ultrasound
• B. X-ray
• C. MRI
• D. CT

Answer: (C)

When disc herniation is suspected with cord compression or cauda equina symptoms, you need detailed visualization of the spinal canal and nerve roots. MRI provides superior soft-tissue contrast, allowing clear depiction of intervertebral discs, thecal sac, spinal cord, and nerve roots, as well as any edema or myelopathy. It shows the exact level and extent of herniation and whether the cauda equina is compressed, which is crucial for urgent management and surgical planning. Ultrasound isn’t suitable for imaging the spine. X-rays reveal bone alignment and degenerative changes but miss most soft-tissue pathology. CT offers good bone detail and can detect certain acute issues, but its soft-tissue contrast is inferior to MRI, making it less sensitive for disc herniation and neural compression. If MRI isn’t possible, CT can be an alternative, but MRI is the best choice for evaluating disc herniation with cord compression or cauda equina symptoms.

When disc herniation is suspected with cord compression or cauda equina symptoms, you need detailed visualization of the spinal canal and nerve roots. MRI provides superior soft-tissue contrast, allowing clear depiction of intervertebral discs, thecal sac, spinal cord, and nerve roots, as well as any edema or myelopathy. It shows the exact level and extent of herniation and whether the cauda equina is compressed, which is crucial for urgent management and surgical planning.

Ultrasound isn’t suitable for imaging the spine. X-rays reveal bone alignment and degenerative changes but miss most soft-tissue pathology. CT offers good bone detail and can detect certain acute issues, but its soft-tissue contrast is inferior to MRI, making it less sensitive for disc herniation and neural compression. If MRI isn’t possible, CT can be an alternative, but MRI is the best choice for evaluating disc herniation with cord compression or cauda equina symptoms.