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Related Experiment Videos

Spinning top urethra: not a normal variant.

H M Saxton1, M Borzyskowski, A R Mundy

  • 1Department of Radiology, Guy's Hospital, London, England.

Radiology
|July 1, 1988
PubMed
Summary
This summary is machine-generated.

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Spinning top urethra (STU) in girls is often linked to bladder instability or wide bladder neck anomalies, not a normal variant. Videourodynamics reveal these underlying urodynamic abnormalities in all studied patients.

Area of Science:

  • Pediatric Urology
  • Urodynamics
  • Female Lower Urinary Tract Dysfunction

Background:

  • Spinning top urethra (STU) is characterized by a widened posterior urethra, predominantly observed in female pediatric patients.
  • STU has been conventionally considered a normal anatomical variant in girls.

Purpose of the Study:

  • To investigate the urodynamic characteristics of girls diagnosed with spinning top urethra (STU).
  • To determine if STU represents a normal variant or an indicator of underlying lower urinary tract dysfunction.

Main Methods:

  • Videourodynamic studies were conducted on a cohort of 30 girls presenting with STU.
  • Analysis focused on identifying bladder instability, bladder neck anomalies, and other urodynamic findings.

Main Results:

Related Experiment Videos

  • All 30 patients exhibited urodynamic abnormalities.
  • Bladder instability was present in 28 girls, while 21 had a congenital wide bladder neck anomaly.
  • Twenty patients presented with both bladder instability and a wide bladder neck, and one had a sensitive bladder.

Conclusions:

  • Spinning top urethra (STU) is rarely a normal variant and is frequently associated with significant urodynamic abnormalities.
  • The findings suggest STU is an indicator of underlying bladder instability or congenital wide bladder neck anomalies.
  • The mechanism involves increased urethral pressure due to unstable detrusor contractions resisted by voluntary sphincter tension.