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Recurrent polyradiculoneuropathy with the 17p11.2 deletion
N Le Forestier1, E LeGuern, P Coullin
1Service d'Explorations Fonctionnelles Neurologiques, Hôpital de la Salpêtrière, Paris, France.
Muscle & Nerve
|September 1, 1997
Summary
Hereditary neuropathy with liability to pressure palsies (HNPP) typically presents as focal nerve issues. This study details the first case of HNPP presenting as a recurrent sensorimotor polyneuropathy, confirmed by PMP-22 gene deletion.
Area of Science:
- Neurology
- Genetics
- Molecular Biology
Background:
- Hereditary neuropathy with liability to pressure palsies (HNPP) is a genetic disorder.
- HNPP classically manifests as recurrent focal neuropathies, often triggered by pressure.
- The underlying genetic cause is frequently a deletion in the PMP-22 gene on chromosome 17p11.2.
Observation:
- This report describes a unique 15-year presentation of HNPP.
- The patient exhibited a recurrent sensorimotor polyneuropathy, deviating from the typical focal pattern.
- Clinical observations were supported by genetic confirmation of a PMP-22 gene deletion.
Findings:
- The study identifies the first documented case of HNPP presenting as a chronic, recurrent sensorimotor polyneuropathy.
- Genetic analysis confirmed a deletion within the PMP-22 gene, the known cause of HNPP.
- This atypical presentation highlights the variable clinical spectrum of HNPP.
Implications:
- Molecular analysis of the 17p11.2 region can aid in diagnosing atypical HNPP cases.
- This finding expands the understanding of HNPP's clinical manifestations.
- Non-invasive genetic testing may prove valuable for patients with chronic recurrent polyneuropathy and nerve palsy episodes.