The Japanese Journal of Urology
Online ISSN : 1884-7110
Print ISSN : 0021-5287
ISSN-L : 0021-5287
POSTERIOR URETHRAL VALVES Experience with 21 Cases
Toshiaki GotohYoshifumi AsanoKatsuya NonomuraMasaki TogashiTomohiko KoyanagiTadashi Matsuno
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1991 Volume 82 Issue 7 Pages 1097-1104


Twenty-one cases of posterior urethral valves experienced in the last 26 years were reported with special references to the morphological and functional sequelae of the upper and lower urinary tracts after the valve ablation. Furthermore, several problems, such as transient urinary diversion, vesicoureteral reflux (VUR), lower ureteral obstruction, transurethral valve ablation, bladder function and renal insufficiency, were also discussed.
The age at the first examination ranged from 0 day to 13 years. Eight boys were first examined under one year of age. Although the most frequent complaint was urinary infection, some characteristic features were observed in each age group. In all of the children the valves were classified as type I (Young). Seven children had severe ones. Endoscopic examination was thought to be essential to find mild ones. VUR was found in 16 children (28 ureters). Grade IV was encountered most frequently (13 ureters) with prominent laterality to the left side. The severity of the renal scar paralleled to the grade of VUR. Most of the dwarf kidneys were thought to be hypodysplastic. Valve ablation was performed immediately after the diagnosis in 17 of the 21 children. Eight children were under one year of age when their valves were ablated. As a principle, VUR was followed conservatively after the valve ablation. VUR highly tended to disappear or improve when it was of low grade or valve ablation was performed under one year of age. However, when the ureteral orifices were craniolateral, disappearance of VUR was rare and recovery of renal function was not observed. In 5 children antireflux surgery was added. Although a dilated upper urinary tract without VUR was found in 2 children (2 ureters), it disappeared promptly after the valve ablation. No urethral stricture was encountered in our series. Five of 12 children, who are over 5 years of age now, have incontinence and/or bed wetting. Urodynamic evaluation revealed detrusor-sphincter dyssynergia in one and uninhibited bladder in 3. Four children showed impaired renal function and 2 of them developed the end-stage renal disease after puberty.

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