Imaging on the painful and compressed nerve: upper extremity

Area of Science:

• Neuroimaging
• Orthopedics
• Neurology

Background:

• Compressive neuropathies of the upper extremity are prevalent, causing pain, weakness, and functional deficits.
• Traditional diagnostic methods (clinical evaluation, electrophysiology) have limitations in lesion localization and etiological identification.
• Peripheral nerve entrapment occurs in specific anatomical regions like osteofibrous tunnels or fibrous bands.

Purpose of the Study:

• To review the role of advanced imaging techniques in diagnosing and managing upper extremity compressive neuropathies.
• To highlight the utility of ultrasonography (US) and magnetic resonance imaging (MRI), including MR neurography and 3D volumetric imaging.
• To discuss the impact of these modalities on evaluating the brachial plexus and specific peripheral nerves (suprascapular, axillary, median, ulnar, radial).

Main Methods:

• Review of current literature on advanced imaging modalities for peripheral nerve evaluation.
• Focus on ultrasonography (US) and magnetic resonance imaging (MRI) techniques, including MR neurography and high-resolution 3D imaging.
• Analysis of key imaging findings: nerve thickening, signal abnormalities, and muscle denervation patterns.

Main Results:

• Advanced US and MRI provide detailed visualization of nerve anatomy and surrounding structures.
• These techniques enable precise localization of nerve compression and identification of underlying causes.
• Imaging reveals characteristic findings such as nerve hypertrophy, altered signal intensity, and denervation changes in muscles.

Conclusions:

• Advanced imaging modalities significantly enhance diagnostic accuracy for compressive neuropathies.
• Integration of US and MRI facilitates better surgical planning and improves patient treatment outcomes.
• These techniques are crucial for comprehensive evaluation and management of peripheral nerve entrapment syndromes.