title: Phenotypic differences in Dyt1 between ethnic groups.
abstract: A DYT1 mutation is the most common genetic cause of early-onset primary torsion dystonia. Herein we present the phenotypes of 25 Korean dystonia patients with DYT1 mutations. We further compare the clinical features of the Asian patients with those of the Western DYT 1 mutation patients. In Korean patients, upper extremity was the most common site of symptom onset while there were a few patients with axial-onset dystonia. Generalized dystonia was the most common subtype followed by segmental dystonia. A few patients from the same families had their symptoms at the same age. The clinical features of Korean patients were similar to those of other Asian patients. The Asian patients were differentiated from Western patients by more frequent axial onset, no cranial involvement at onset, and more common segmental dystonia. The variable clinical manifestation in different ethnic groups may suggest that ethnicity is a significant modifier of DYT1 dystonia.
authors.affiliation: Movement Disorder Center, Seoul National University Hospital, 101 Daehak-ro Jongno-gu, Seoul, 110-744, South Korea. w2pooh@gmail.com
authors.forename: Woong-Woo
authors.initials: WW
authors.lastname: Lee
authors.forename: Tae-Beom
authors.initials: TB
authors.lastname: Ahn
authors.forename: Sun Ju
authors.initials: SJ
authors.lastname: Chung
authors.forename: Beom Seok
authors.initials: BS
authors.lastname: Jeon
mesh_terms: D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D044466:Asian People / Q000235:genetics*; D004252:DNA Mutational Analysis; D004422:Dystonia Musculorum Deformans / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D009154:Mutation / Q000235:genetics*; D010641:Phenotype; D044465:White People / Q000235:genetics*; D055815:Young Adult