Diagnosis of urethral diverticula and periurethral masses.

Aim: To give recommendations for the standard diagnostic assessment of urethral diverticula and periurethral masses based on an evaluation of our results and a survey of the recent literature. Methods: Group I (1981-1993) included 47 women in whom urethral diverticula (n=34), periurethral cysts (n=11), and periurethral leiomyomas (n=2) were diagnosed and the results compared with the intraoperative findings. Diagnostic work-up comprised history taking, vaginal palpation, introitus ultrasound, double-balloon urethrography (DBU), voiding cystourethroscopy (VCU), excretion urography (EU), and urethrocystoscopy. Group II (1994-1996) included 12 women with urethral diverticula who were examined by DBU, 2D and 3D introitus ultrasound. The diagnostic accuracy of the different methods was assessed. Results: Group I: The diagnostic accuracy in identifying urethral diverticula was 85.3% for palpation, 61.5% for introitus ultrasound, 93.8% for DBU, 37.5% for EU, and 30.0% for urethrocystoscopy. Of all imaging modalities used, only introitus ultrasound depicted periurethral cysts and leiomyomas. Group II: The DBU, 2D and 3D introitus ultrasound had a diagnostic accuracy of 100% in identifying urethral diverticula. Conclusions: Introitus ultrasound should be used as the basic diagnostic tool in clinically suspected urethral diverticula or periurethral masses and additional DBU should be restricted to cases with inconclusive findings.