case_images: PMC7585548_01
case_images: Ultrasonographic image of the brachial plexus in the interscalene. Three nerve trunks are indicated with red arrows. Their cross sectional dimensions are approximately 6.3 x 4.4 mm (upper trunk), 6.3 x 5.3 mm (middle trunk), and 7.8 x 6.3 mm (lower trunk).
case_images: LRA-13-141-g0001.jpg
case_images: PMC7585548_01_LRA-13-141-g0001.jpg
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case_images: Unexpectedly, ultrasonographic images revealed enlarged brachial plexus nerves (Figure 1).
case_images: The patient's feet as a pathognomonic characteristic of CMTD, showing high arches and claw toes. The patient had not noticed these abnormalities.
case_images: LRA-13-141-g0002.jpg
case_images: PMC7585548_01_LRA-13-141-g0002.jpg
case_images: f0002
case_images: The neurologist suspected CMTD based on the characteristic nerve enlargement and foot deformity, which is pathognomonic of CMTD (Figure 2).
case_images: Cervical magnetic resonance imaging (MRI) without contrast medium enhancement. All bilateral brachial nerves are identified as gigantic on a coronal T2-weighted image. The red arrow shows the enlargement of the cervical nerves.
case_images: LRA-13-141-g0003.jpg
case_images: PMC7585548_01_LRA-13-141-g0003.jpg
case_images: f0003
case_images: Gigantic bilateral brachial nerves were observed on a coronal T2-weighted image (Figure 3).