Which imaging is used to diagnose multiple sclerosis with gadolinium enhancement?

Which imaging is used to diagnose multiple sclerosis with gadolinium enhancement?

• A. Lumbar puncture
• B. EEG
• C. Magnetic resonance imaging with gadolinium
• D. PET scan

Answer: (C)

Gadolinium-enhanced MRI is used because it reveals active inflammatory lesions in multiple sclerosis. After the contrast is given, areas where the blood-brain barrier is disrupted—representing active demyelinating plaques—show enhancement on MRI. This highlights active disease and helps confirm dissemination over time and space, which is central to MS evaluation and monitoring. The other options don’t provide gadolinium-enhanced imaging: lumbar puncture analyzes the CSF for inflammatory markers like oligoclonal bands, but it isn’t an imaging study; EEG looks at electrical brain activity and doesn’t show structural lesions; PET scans measure metabolic activity and are not standard for diagnosing MS with gadolinium enhancement. Therefore, magnetic resonance imaging with gadolinium is the best choice.

Gadolinium-enhanced MRI is used because it reveals active inflammatory lesions in multiple sclerosis. After the contrast is given, areas where the blood-brain barrier is disrupted—representing active demyelinating plaques—show enhancement on MRI. This highlights active disease and helps confirm dissemination over time and space, which is central to MS evaluation and monitoring. The other options don’t provide gadolinium-enhanced imaging: lumbar puncture analyzes the CSF for inflammatory markers like oligoclonal bands, but it isn’t an imaging study; EEG looks at electrical brain activity and doesn’t show structural lesions; PET scans measure metabolic activity and are not standard for diagnosing MS with gadolinium enhancement. Therefore, magnetic resonance imaging with gadolinium is the best choice.