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. 2024 Feb 26;14:4643. doi: 10.1038/s41598-024-54452-8

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Median and Ulnar nerve in CIDP (A), in anti-MAG neuropathy (B), d-CIDP (C) and in healthy subject (D). In CIDP (A) thinning of perifascicular epineurium due to compression/dislocation from swollen fascicles. Reduced number of fascicles and swollen fascicles compared to healthy controls especially in more proximal nerve sites due to endoneuronal oedema. Focal/diffuse hypoechogenicity. In Anti-MAG neuropathy (B), reduced number of swollen fascicles with normal or slightly reduced perifascicular epineurium. Same or slightly reduced number of fascicles compared to healthy controls. Normal or slightly reduced echogenicity. In d-CIDP (C), normal number of swollen fascicles with normal or slightly reduced perifascicular epineurium. Normal or focal/diffuse hypoechogenicity.