title: A prognostic factor in focal hand dystonia: typist's cramp cases and literature review.
abstract: The prognosis of focal hand dystonia (FHD) remains unclear. We retrospectively studied six patients with typist's cramp in our hospitals, and five cases in the PubMed database. All of them were right-handed. We compared clinical features between simple (dystonia in only one specific task), and dystonic/progressive groups (dystonia in several and/or new tasks). The initially affected right hand ratio was significantly higher in dystonic/progressive groups than in simple group (p=0.015). Initially affected hand may be a predictor for the progression, implying that the progression may be associated with the amount of daily routine hand movements.
authors.affiliation: Department of Neurology, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Jee Hyun
authors.initials: JH
authors.lastname: Ham
authors.affiliation: Department of Neurology, Inje University College of Medicine, Busan, Republic of Korea.
authors.forename: Sang Jin
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Neurology, Jeju National University School of Medicine, 1 Ara 1-dong, Jeju-si, Jeju 690-756, Republic of Korea.
authors.forename: Sook Keun
authors.initials: SK
authors.lastname: Song
authors.affiliation: Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Chul Hyoung
authors.initials: CH
authors.lastname: Lyoo
authors.affiliation: Department of Neurology, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Phil Hyu
authors.initials: PH
authors.lastname: Lee
authors.affiliation: Department of Neurology, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Sohn
authors.affiliation: Department of Neurology, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Gyeonggi-Do, Republic of Korea. Electronic address: sukyunkang@hanmail.net.
authors.forename: Suk Yun
authors.initials: SY
authors.lastname: Kang
mesh_terms: D000328:Adult; D000368:Aged; D020821:Dystonic Disorders / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006225:Hand / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009048:Motor Skills / Q000502:physiology; D011379:Prognosis; D012189:Retrospective Studies
keywords: Dystonia; Focal hand dystonia; Handedness; Movement disorders; Prognosis; typist's cramp