Introduction and Hypothesis Urethral diverticulum (UD) is a protrusion of the urethra through the periurethral fascia. We aimed to determine the population-based incidence of female UD. Methods Using the records-linkage system of the Rochester Epidemiology Project (REP), we identified women 18 years and older with a new diagnosis of UD in Olmsted County, Minnesota, from January 1, 1980, through December 31, 2011. We also identified cases meeting the same criteria diagnosed at Mayo Clinic, regardless of county of residency. Incidence rates were calculated and trends for changes in incidence over time were tested. We conducted a systematic search of the MEDLINE, EMBASE, Cochrane Systematic Reviews, CENTRAL, Web of Science, and Scopus databases from inception through March 30, 2013, to identify published reports of UD incidence or prevalence. Results We identified 164 incidence cases, including 26 women residing in Olmsted County. Age-adjusted annual incidence of UD in Olmsted County was 17.9 per 1,000,000 women (<0.02%) per year (95% CI, 10.9–24.9). We observed a trend for increased incidence during the past 3 decades (P=.03). In our literature review, only 7 studies included an estimate of incidence or prevalence of UD; these estimates ranged from 6.4 per 1,000,000 per year (<0.01%) having surgical intervention related to UD to a 4.7% rate of UD diagnosed in asymptomatic women admitted for gynecologic or obstetric issues. Conclusion In this population-based study, female UD was a rare disease, affecting fewer than 20 per 1,000,000 women (<0.02%) per year.
Introduction and Hypothesis To report on clinical presentation, diagnosis, and outcomes after treatment of female urethral diverticulum (UD). Methods Using a record linkage system, women with a new diagnosis of UD at Mayo Clinic from January 1, 1980, through December 31, 2011, were identified. The presenting symptoms, clinical characteristics, diagnosis, and management of women presenting with UD were recorded. Outcomes after surgery were assessed using survival analysis. All statistical analyses were 2-sided and P values less than 0.05 were considered significant. Statistical analysis was done using SAS version 9.2 and JMP version 9.0 (SAS Institute Inc.). Results A total of 164 cases were identified. Median age at diagnosis was 46 years (range, 21–83). The most common presenting symptom was recurrent urinary tract infection (98, 59.8%), followed by urinary incontinence (81, 49.4%), dysuria (62, 37.8%), dyspareunia (37, 22.6%), and hematuria (15, 9.1%). Examination revealed vaginal mass in 55 (33.5%) of the women. A significant trend was noted toward an increase in use of both magnetic resonance imaging and computed tomography (P < 0.001) along with a progressive decrease in use of urethrogram (P < 0.001) for diagnosis of UD over the years. Among 114 women who underwent surgical treatment for UD, 14(12.3%) women presented with recurrent UD and the 5-year recurrence rate after surgery for UD was 23.4% (95% confidence interval, 13.9–37.0) and a reoperation rate of 17.0% (95% confidence interval, 8.8–30.2) at 5 years. Conclusions Female UD is a rare and unique condition. Clinical presentation is usually nonspecific, and magnetic resonance imaging is commonly used for confirming the diagnosis. Recurrence is not uncommon, and repeat surgical intervention might be needed.
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