Volume 35, Issue 5 pp. 608-615
Original Article
Full Access

Hereditary motor and sensory neuropathy with diaphragm and vocal cord paresis

Dr. Peter James Dyck MD

Corresponding Author

Dr. Peter James Dyck MD

Peripheral Neuropathy Research Center and Laboratories, Rochester, MN

Mayo Clinic, 200 First Street SW, Rochester, MN 55905Search for more papers by this author
William J. Litchy MD

William J. Litchy MD

Peripheral Neuropathy Research Center and Laboratories, Rochester, MN

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Sharon Minnerath BS

Sharon Minnerath BS

Peripheral Neuropathy Research Center and Laboratories, Rochester, MN

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Thomas D. Bird MD

Thomas D. Bird MD

Veterans Administration Medical Center, Seattle, WA

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Phillip F. Chance MD

Phillip F. Chance MD

Division of Medical Genetics, University of Utah Medical Center, Salt Lake City, UT

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Daniel J. Schaid PhD

Daniel J. Schaid PhD

Section of Biostatistics, Mayo Clinic and Mayo Foundation, Rochester, MN

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Arnold E. Aronson PhD

Arnold E. Aronson PhD

Peripheral Neuropathy Research Center and Laboratories, Rochester, MN

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First published: May 1994
Citations: 112

Abstract

We describe two kindreds with an autosomal dominant inherited disorder characterized by a variable degree of muscle weakness of limbs, vocal cords, and intercostal muscles and by asymptomatic sensory loss, beginning in infancy or childhood in severely affected persons. Life expectancy in severely affected patients is shortened because of respiratory failure. Because nerve conduction velocities are normal and it is an inherited axonal neuropathy, we classify the disorder as a variety of hereditary motor and sensory neuropathy type II (HMSN II) (HMSN IIc). The present report provides further evidence for heterogeneity among the hereditary motor and sensory neuropathy type II disorders. In one large pedigree with the type IIc disorder, no linkage to DNA markers known to map near the HMSN IA locus on chromosome 17p or the HMSN IB locus on chromosome 1q was demonstrated.

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