Journal of Clinical Neurology  2007;3(2):101-104

doi:10.3988/jcn.2007.3.2.101

A Family Harboring CMT1A Duplication and HNPP Deletion.

Jung Hwa LEE 1 ; Hee Jin KANG ; Hyunseok SONG ; Su Jin HWANG ; Sun Young CHO ; Sang Beom KIM ; Joonki KIM ; Ki Wha CHUNG ; Byung Ok CHOI

Affiliations

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Keywords

Charcot-Marie-Tooth disease; HNPP; PMP22

Country

Republic of Korea

Language

English

Abstract

Charcot-Marie-Tooth disease type 1A (CMT1A) is associated with duplication of chromosome 17p11.2-p12, whereas hereditary neuropathy with liability to pressure palsies (HNPP), which is an autosomal dominant neuropathy showing characteristics of recurrent pressure palsies, is associated with 17p11.2-p12 deletion. An altered gene dosage of PMP22 is believed to the main cause underlying the CMT1A and HNPP phenotypes. Although CMT1A and HNPP are associated with the same locus, there has been no report of these two mutations within a single family. We report a rare family harboring CMT1A duplication and HNPP deletion.