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Updated: Sep 29, 2025

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
Published on: October 7, 2021
Different patterns of sensory nerve involvement in chronic inflammatory demyelinating polyneuropathy subtypes
Kazumoto Shibuya1, Atsuko Tsuneyama1, Sonoko Misawa1
1Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan.
Typical chronic inflammatory demyelinating polyneuropathy (CIDP) preferentially affects sensory nerve terminals, unlike multifocal CIDP. This suggests distinct immune mechanisms underlie these CIDP subtypes, impacting nerve conduction differently.
Area of Science:
- Neurology
- Neurophysiology
- Immunology
Background:
- Chronic inflammatory demyelinating polyneuropathy (CIDP) encompasses subtypes with proposed distinct immune pathophysiologies.
- Understanding these differences is crucial for targeted treatment strategies.
Purpose of the Study:
- To compare sensory nerve conduction studies across CIDP clinical subtypes.
- To elucidate the underlying pathophysiological differences between typical and multifocal CIDP.
Main Methods:
- Sensory nerve action potentials (SNAPs) were recorded in 138 CIDP patients (typical, multifocal) and 19 anti-MAG neuropathy controls.
- Nerve conduction parameters (amplitude, velocity) were analyzed in median, ulnar, radial, and sural nerves.
Main Results:
- Typical CIDP showed lower median nerve SNAP amplitudes and velocities compared to multifocal CIDP.
- Ulnar nerve conduction velocities were also reduced in typical CIDP.
- Low median and normal sural SNAP amplitudes were more frequent in typical CIDP, indicating terminal nerve involvement.
Conclusions:
- Typical CIDP preferentially involves the terminal portions of sensory nerves.
- Multifocal CIDP appears to affect nerve trunks more broadly.
- These findings support distinct immune-mediated mechanisms (antibody vs. cell-mediated) in CIDP subtypes.
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