A 30-year-old male with hereditary motor and sensory neuropathy, type I (HMSN I), presented with asymmetric weakness of finger extension and radial deviation with left wrist extension, previously felt to be a manifestation of the peripheral neuropathy. Nerve conduction studies confirmed HMSN I; howe
Hereditary motor and sensory neuropathy type I: Clinical and neurographical features of the 17p duplication subtype
β Scribed by Dr. Jessica E. Hoogendijk; Dr. Marianne de Visser; Dr. Pieter A. Bolhuis; Dr. Augustinus A. M. Hart; Dr. Bram W. Ongerboer de Visser
- Book ID
- 102955348
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 539 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0148-639X
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β¦ Synopsis
Forty-four affected individuals, aged 8-68 years (mean 34 years), from six families with hereditary motor and sensory neuropathy type I (HMSN I, Charcot-Marie-Tooth disease type 1) were investigated to determine the clinical and electroneurographical characteristics of the HMSN I subtype that is defined by the presence of a DNA duplication on chromosome 17p. Motor nerve conduction velocity (MNCV) and, to a lesser extent, compound muscle action potential amplitude, were inversely related to clinical severity. Neither clinical severity nor MNCV were significantly related to age. These results suggest that the primary pathological process is not, or only slightly active after childhood. o 1994 John Wiley & Sons, Inc.
π SIMILAR VOLUMES
Hereditary motor and sensory neuropathy type I (HMSNI), also known as Charcot-Marie-Tooth disease type 1 (CMTl), has been shown to be genetically heterogeneous. A major gene maps to chromosome 17 (CMTlA). A set of loci, D17S122, D17S125, and D17S124, show tight linkage to the C M T l A locus, and a
Davidenokow's syndrome has been defined as a hereditary disorder characterized by proximal muscle weakness and wasting in the uper limbs with distal weakness in the lower, and associated with distal sensory loss in all four limbs. It has been assumed to be genetically distinct. A family is described