title: Voiding Dysfunction in Spinocerebellar Ataxia Type 31.
abstract: OBJECTIVE
  To describe a case of SCA31 who presented with possible neurogenic voiding dysfunction.
  
  
  METHODS
  A case report.
  
  
  RESULTS
  A 73-year-old man with a 5-year history of cerebellar ataxia developed partial urinary retention. His father and a sister had cerebellar ataxia. Brain magnetic resonance imaging revealed cerebellar atrophy, and gene analysis revealed TGGAA repeat prolongation, and he was diagnosed with spinocerebellar ataxia 31. Urodynamics revealed normal bladder filling but a slightly weak detrusor and a post-void residual urine volume of 130 mL, whereas his prostate volume was normal (26 mL). External sphincter electromyography revealed neurogenic change in the motor unit potentials. In order to lessen the post-void residual, hewas started on 15mg/day pilocarpine with benefit. The weak detrusor and sphincter electromyography abnormality indicated involvement of the sacral spinal cord in this disorder.
  
  
  CONCLUSIONS
  Neurogenic urinary retention in SCA31 can be listed in the clinical differential diagnosis of cerebellar ataxia. However, possible outflow obstruction in men should always be explored.
authors.affiliation: Clinical Physiology Unit, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Sugiyama
authors.affiliation: Department of Neurology and Internal Medicine, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Ryuji
authors.initials: R
authors.lastname: Sakakibara
authors.affiliation: Department of Neurology and Internal Medicine, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Fuyuki
authors.initials: F
authors.lastname: Tateno
authors.affiliation: Department of Urology, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Yano
authors.affiliation: Clinical Physiology Unit, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Takahashi
authors.affiliation: Department of Neurology and Internal Medicine, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Kishi
authors.affiliation: Department of Neurology and Internal Medicine, Sakura Medical Center, Toho University, Sakura, Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Tsuyusaki
authors.affiliation: Department of Neurology, Chiba University, Chiba, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Yamamoto
authors.affiliation: Continence Center, Dokkyo Medical College, Tochigi, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Uchiyama
authors.affiliation: Continence Center, Dokkyo Medical College, Tochigi, Japan.
authors.forename: Tomonori
authors.initials: T
authors.lastname: Yamanishi
authors.affiliation: Continence Center, Dokkyo Medical College, Tochigi, Japan.
authors.forename: Chiharu
authors.initials: C
authors.lastname: Yamaguchi
authors.affiliation: Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan.
authors.forename: Fumio
authors.initials: F
authors.lastname: Nomura
keywords: autonomic dysfunction; spinal cord; spinocerebellar ataxia type 31; urinary dysfunction