Volume 17, Issue 1 pp. 112-122

Characteristics of clinical and electrophysiological pattern of Charcot-Marie-Tooth 4C

Marion Yger

Marion Yger

APHP, Center for reference of neuromuscular diseases, Paris-Est

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Tanya Stojkovic

Tanya Stojkovic

APHP, Center for reference of neuromuscular diseases, Paris-Est

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Sandrine Tardieu

Sandrine Tardieu

INSERM, CRICM (UMRS _ 975), Pitié-Salpêtrière University Hospital, Paris, France

UPMC, Paris 06 University, Paris, France

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Thierry Maisonobe

Thierry Maisonobe

Clinical Neurophysiology Department

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Alexis Brice

Alexis Brice

INSERM, CRICM (UMRS _ 975), Pitié-Salpêtrière University Hospital, Paris, France

UPMC, Paris 06 University, Paris, France

AP-HP, Genetic and Cytogenetic Department, Center of Molecular and Chromosomal Genetics, Pitié-Salpêtrière University Hospital, Paris, France

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Andoni Echaniz-Laguna

Andoni Echaniz-Laguna

Neurology Department, University Hospital, Strasbourg, France

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Yves Alembik

Yves Alembik

Medical Genetics Departement, University Hospital, Strasbourg, France

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Samantha Girard

Samantha Girard

AP-HP, Genetic and Cytogenetic Department, Center of Molecular and Chromosomal Genetics, Pitié-Salpêtrière University Hospital, Paris, France

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Cécile Cazeneuve

Cécile Cazeneuve

INSERM, CRICM (UMRS _ 975), Pitié-Salpêtrière University Hospital, Paris, France

UPMC, Paris 06 University, Paris, France

AP-HP, Genetic and Cytogenetic Department, Center of Molecular and Chromosomal Genetics, Pitié-Salpêtrière University Hospital, Paris, France

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Eric LeGuern

Eric LeGuern

INSERM, CRICM (UMRS _ 975), Pitié-Salpêtrière University Hospital, Paris, France

UPMC, Paris 06 University, Paris, France

AP-HP, Genetic and Cytogenetic Department, Center of Molecular and Chromosomal Genetics, Pitié-Salpêtrière University Hospital, Paris, France

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Odile Dubourg

Corresponding Author

Odile Dubourg

APHP, Center for reference of neuromuscular diseases, Paris-Est

Dr. Odile Dubourg, MD, PhD, Institut de Myologie, Hôpital de la Pitié-Salpêtrière, 47-83 boulevard de l'hôpital, 75013 Paris, France. Tel: +33-1 42163773; Fax: +33-1 42163793; E-mail: [email protected]Search for more papers by this author
First published: 28 March 2012
Citations: 37

Abstract

To describe the clinical and electrophysiological features evoking CMT4C, an autosomal recessive (AR) form of Charcot-Marie-Tooth disease (CMT) due to mutations in the SH3TC2 gene, we screened the coding sequence of SH3TC2 gene in 102 unrelated patients with a demyelinating or intermediate CMT and a family history compatible with an AR transmission. We identified among this cohort 16 patients carrying two mutations in the SH3TC2 gene, but medical records finally analyzed 14 patients. We report clinical, electrophysiological, and molecular data of 14 patients (9 men, 5 women) with CMT4C. Mean age at examination was 43.6 years (median = 42.5). Among the 14 studied cases 6 had scoliosis as the presenting sign. Cranial nerve involvement affecting either the VIIIth, VIIth, XIIth or a combination of the IXth and Xth nerves was noted in 10 patients. Remarkably, 50% of the patients had proximal limb involvement at the time of examination. The hallmark of the electrophysiological study was the presence of probable conduction block and temporal dispersion. Thus the clinical and paraclinical spectrum of CMT4C can guide the clinician to perform analysis of the SH3TC2 gene.

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