HNPP: investigations
Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .
HNPP: investigations. Prolonged distal motor latency, Prolonged F wave, Normal or mild reduced conduction velocities. Fully referenced neurology checklist.
Nerve conduction studies (NCS): features
- Prolonged distal motor latency
- Prolonged F wave
- Normal or mild reduced conduction velocities
- Reduced sensory nerve action potentials (SNAPs)
- Segmental slowing at compression sites
Magnetic resonance imaging (MRI): features
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Acronym
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References
- Horowitz SH, Spollen LE, Yu W. Hereditary neuropathy with liability to pressure palsy: the development with axonal loss during military training. JNNP 2004; 75:1629-1631.
- van Paassen B, van der Kooi A, van Spaendonck-Zwarts KY, Verhamme C, Baas F, de Visser M. PMP22 related neuropathies: Charcot-Marie-Tooth disease type 1A and hereditary neuropathy with liability to pressure palsies. Orphanet J Rare Dis 2014; 9:38.
- Mouton P, Tardieu S, Gouider R, et al. Spectrum of clinical and electrophysiologic features in HNPP patients with the 17p11.2 deletion. Neurology 1999; 52:1440-1446.
- Tackenberg B, Moller JC, Rindock H, et al. CNS involvement in hereditary neuropathy with pressure palsies (HNPP). Neurology 2006; 67:2250-2252.
