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The duplex collecting system in girls with urinary tract infection: prevalence and significance

G S Bisset, J L Strife

    AJR. American Journal of Roentgenology
    |March 1, 1987
    PubMed

    Insights

    Duplex collecting system anomalies are present in 8% of girls with urinary tract infections. Complete duplex systems show higher rates of vesicoureteral reflux and scarring, requiring closer monitoring.

    Area of Science:

    • Pediatric Urology
    • Medical Imaging
    • Congenital Anomalies

    Background:

    • Urinary tract infections (UTIs) in children are common.
    • Vesicoureteral reflux (VUR) and renal scarring are known complications of UTIs in nonduplicated systems.
    • Data on duplex collecting systems, a congenital anomaly, are less understood in relation to UTIs.

    Purpose of the Study:

    • To investigate the prevalence of duplex anomalies in girls experiencing UTIs.
    • To compare VUR and parenchymal scarring rates in duplex systems versus nonduplex systems.
    • To identify clinical differences between complete and partial duplex systems in girls with UTIs.

    Main Methods:

    • Retrospective review of voiding cystourethrograms and excretory urograms.
    • Analysis of 560 girls referred for UTI evaluation.
    • Categorization of duplex systems into complete and partial types.

    Main Results:

    • Duplex collecting systems were identified in 8% of the girls studied.
    • Vesicoureteral reflux occurred in 69% of complete duplex systems and 22% of partial duplex systems.
    • Parenchymal scarring was observed in 17% of complete and 6% of partial duplex systems.

    Conclusions:

    • Partial duplex systems in girls with UTIs present similarly to nonduplex systems regarding VUR and scarring.
    • Complete duplex systems are associated with significantly higher rates of VUR and anomalies.
    • Girls with complete duplex systems warrant closer follow-up and potential surgical intervention.

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