title: Skeletal muscle abnormalities in two patients with dystonia.
abstract: We report two patients with dystonia aged 53 and 27 years. One patient was diagnosed as a sporadic case of primary dystonia. The other patient was diagnosed as having secondary dystonia following head injury. Skeletal muscle specimens were obtained by open biopsy from the two patients. The muscle biopsy specimens showed lobulated fibers, ring fibers, and type 1 fiber atrophy. Dystonia comprises involuntary movement and causes abnormal muscle tone. We considered that the abnormal muscle tone caused by dystonia might be involved in the pathogenesis of these histochemical changes in skeletal muscle.
authors.affiliation: Third Department of Internal Medicine, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan. takahito@m.kufm.kagoshima-u.ac.jp
authors.forename: Takahito
authors.initials: T
authors.lastname: Niiyama
authors.forename: Itsuro
authors.initials: I
authors.lastname: Higuchi
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Uchida
authors.forename: Takashi
authors.initials: T
authors.lastname: Horikiri
authors.forename: Kimiyoshi
authors.initials: K
authors.lastname: Arimura
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Osame
mesh_terms: D000328:Adult; D004421:Dystonia / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000473:pathology* / Q000503:physiopathology / Q000648:ultrastructure*