Cervical Root Enlargement in Segmental Zoster Paresis: A Study with Magnetic Resonance Imaging and Nerve Ultrasound

Shinichi Wada; Hirohisa Hirano; Naoko Uehara; Yuri Kurotobi; Koji Tsuzaki; Naoko Takamatsu; Masaaki Fujita; Toshiaki Hamano

doi:10.2169/internalmedicine.8538-21

This article has now been updated. Please use the final version.

Cervical Root Enlargement in Segmental Zoster Paresis: A Study with Magnetic Resonance Imaging and Nerve Ultrasound

Shinichi Wada, Hirohisa Hirano, Naoko Uehara, Yuri Kurotobi, Koji Tsuzaki, Naoko Takamatsu, Masaaki Fujita, Toshiaki Hamano

Author information

Keywords: Segmental zoster paresis, MRI, Nerve ultrasound, Follow-up, cervical nerve root, Sjögren syndrome

JOURNAL OPEN ACCESS Advance online publication

Article ID: 8538-21

DOI https://doi.org/10.2169/internalmedicine.8538-21

The final version of this article is now available: Vol. 61 (2022), No. 15 pp. 2361-2365

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Abstract

A 72-year-old woman presented with acute-progressive muscle weakness after a rash in the left upper limb. Muscle weakness was restricted to the left C5 innervated muscles. Short inversion time inversion recovery magnetic resonance imaging (MRI) showed a high-intensity signal in the left C5 nerve root, and nerve ultrasound showed its enlargement. She was diagnosed with segmental zoster paralysis (SZP) and treated with acyclovir and methylprednisolone. Her muscle strength gradually recovered, and the abnormal signal and enlargement in the left C5 nerve root improved. This is the first SZP case of confirmed improvement of abnormal findings on MRI and nerve ultrasound in association with muscle power recovery. (106 words)

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