• Internal medicine · Jun 2021

    Case Reports

    Magnetic Resonance Neurography in a Patient with Distal Neuralgic Amyotrophy.

    • Ryunosuke Nagao, Tomomasa Ishikawa, Yasuaki Mizutani, Yoshiki Niimi, Sayuri Shima, Mizuki Ito, Kazuhiro Murayama, Hiroshi Toyama, Akihiro Ueda, and Hirohisa Watanabe.
    • Department of Neurology, Fujita Health University School of Medicine, Japan.
    • Intern. Med. 2021 Jun 1; 60 (11): 1759-1761.

    AbstractThe pathophysiology of neuralgic amyotrophy (NA) remains to be elucidated. However, high-resolution magnetic resonance imaging and ultrasound sonography have provided new insights into the mechanism underlying the development of NA and its diagnosis. We report a case of idiopathic distal NA with hyperintensity and thickening in the inferior trunk extending to the posterior and medial fasciculus of the left brachial plexus, which was detected by magnetic resonance neurography (MRN) with diffusion-weighted whole-body imaging with background body signal suppression (DWIBS). The abnormal signal intensity diminished after the improvement of symptoms following corticosteroid treatment. MRN with DWI can help diagnose distal NA and evaluate the post-therapeutic response.

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