title: Leiomyoma of the bladder presenting as acute urinary retention in a female patient: urodynamic analysis of lower urinary tract symptom; a case report.
abstract: BACKGROUND
  Most bladder tumors are derived from the urothelium. Benign mesenchymal tumors are rare. Leiomyoma of the bladder is the most common benign neoplasm. We present a case of leiomyoma of the bladder presenting with acute urinary retention in a female patient and report on the post-operative change in urodynamic findings. To our knowledge, few cases of this kind have been reported.
  
  
  METHODS
  A 56-year-old woman presented with acute urinary retention. Evaluations including ultrasound, magnetic resonance imaging, cystoscopy, and urodynamics contributed to a diagnosis of leiomyoma of the bladder. Various medications were ineffective for solving her lower urinary tract symptoms; therefore, a transurethral resection was performed. The final pathological report was leiomyoma. After the operation, her symptoms resolved; this improvement was confirmed by an urodynamic analysis. The postoperative urodynamics demonstrated a lower frequency of detrusor overactivity during filling cystometry and an increase in the uroflow rate, with reduced detrusor pressure in a pressure flow study.
  
  
  CONCLUSIONS
  Leiomyoma of the bladder can cause female outlet obstruction. A review of the literature and disease management is discussed.
authors.affiliation: Department of Urology, Saitama Medical School, Moroyama, Saitama, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Matsushima
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Asakura
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Sakamoto
authors.forename: Minoru
authors.initials: M
authors.lastname: Horinaga
authors.forename: Yoko
authors.initials: Y
authors.lastname: Nakahira
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Yanaihara
mesh_terms: D005260:Female; D006801:Humans; D007889:Leiomyoma / Q000150:complications* / Q000503:physiopathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008365:Manometry; D008875:Middle Aged; D016896:Treatment Outcome; D001748:Urinary Bladder Neck Obstruction / Q000209:etiology; D001749:Urinary Bladder Neoplasms / Q000150:complications* / Q000503:physiopathology* / Q000601:surgery; D016055:Urinary Retention / Q000175:diagnosis / Q000209:etiology*; D014563:Urodynamics; D013520:Urologic Surgical Procedures / Q000379:methods