PMC7585548_01
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).
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Unexpectedly, ultrasonographic images revealed enlarged brachial plexus nerves (Figure 1).
The patient's feet as a pathognomonic characteristic of CMTD, showing high arches and claw toes. The patient had not noticed these abnormalities.
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The neurologist suspected CMTD based on the characteristic nerve enlargement and foot deformity, which is pathognomonic of CMTD (Figure 2).
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.
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Gigantic bilateral brachial nerves were observed on a coronal T2-weighted image (Figure 3).