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3 Tesla MR Neurography of Common Peroneal Neuropathy- A Case-Control Study
Avneesh Chhabra, MD; Pearlene Lee; Gedge Rosson; Alan J Belzberg; Eric H Williams; John Eng; John A Carrino
Johns Hopkins University, Baltimore, MD, USA

The brachial plexus is a series of nerve convergences and separations, which ultimately combine into large terminal nerves that supply the upper extremity. It can be subject to a variety of pathologies, which may result in brachial plexopathy, a clinical syndrome that includes motor and sensory disturbances. The diagnosis of brachial plexopathy has traditionally relied on history, clinical findings and electrodiagnostic tests. However, clinical differentiation of brachial plexopathy from other neurological disorders or spinal-related abnormalities often remains a diagnostic challenge. Due to its versatility and improved anatomic detail, MR Neurography (MRN) has been increasingly employed in recent years to evaluate cases of suspected or established brachial plexopathy, in order to confirm the diagnosis and/or provide anatomic information for subsequent surgery. This presentation will encompass high resolution 3 Tesla (T) and 3-dimensional (D) MRN imaging with a series of illustrative cases showing the anatomy of the brachial plexus and the various common pathologies, such as brachial plexitis, thoracic outlet syndrome (pre- and post-operative appearances), nerve sheath tumors, and polyneuropathies. Relevant surgical correlations will be presented. Additional associated peripheral branch nerve abnormalities involving suprascapular nerve, musculocutaneous nerve, radial nerve, etc will be presented. Role of high resolution 3T and 3D imaging with curved planar and MIP reconstructions in improved visualization of the nerve pathologies will be highlighted.

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