MRI of Foot Drop: How We Do It

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Foot drop, characterized by ankle dorsiflexion weakness, can stem from various lumbar, pelvic, or lower leg pathologies.
• Common etiologies include L5 radiculopathy, lumbosacral plexopathy, sciatic neuropathy, and peroneal neuropathy.

Purpose of the Study:

• To highlight the utility of MR neurography in diagnosing the causes of foot drop.
• To demonstrate how MR neurography complements electrodiagnostic testing for lesion localization and characterization.
• To emphasize the role of radiologists in guiding appropriate imaging and treatment for foot drop.

Main Methods:

• MR neurography protocols are tailored based on clinical notes, electrodiagnostic findings, and clinician consultations.
• Radiologists interpret MR neurography, integrating knowledge of peripheral nerve anatomy, pathology, and clinical/electrodiagnostic evaluations.

Main Results:

• MR neurography serves as a valuable tool for verifying lesion sites in foot drop.
• It accurately characterizes the underlying cause of neuropathy, overcoming limitations of other diagnostic methods.
• Tailored MR neurography helps guide effective patient treatment strategies.

Conclusions:

• MR neurography is a crucial imaging modality for diagnosing complex foot drop cases.
• Collaboration between radiologists and referring clinicians ensures optimal imaging and diagnosis.
• Accurate diagnosis via MR neurography facilitates appropriate management and treatment planning.