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Eur J Pediatr Surg 2019; 29(01): 085-089
DOI: 10.1055/s-0038-1672146
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Does Voiding Cystourethrogram Exclude Posterior Urethral Valves in Late Presenting Cases?

Mehmet Ali Özen
1   Department of Pediatric Surgery, Koç University School of Medicine, Istanbul, Turkey
,
Mehmet Taşdemir
2   Department of Pediatric Nephrology, Koç University School of Medicine, Istanbul, Turkey
,
Gökhan Gündoğdu
1   Department of Pediatric Surgery, Koç University School of Medicine, Istanbul, Turkey
,
Ilmay Bilge
2   Department of Pediatric Nephrology, Koç University School of Medicine, Istanbul, Turkey
,
Cenk Büyükünal
3   Department of Pediatric Urology, Cerrahpaşa School of Medicine, Istanbul University, İstanbul, Turkey
,
Egemen Eroğlu
1   Department of Pediatric Surgery, Koç University School of Medicine, Istanbul, Turkey
› Author Affiliations
Further Information

Publication History

02 May 2018

13 August 2018

Publication Date:
28 September 2018 (online)

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Abstract

Introduction Delayed presentation of posterior urethral valves (PUVs) is a rare condition. Presentation and diagnosis of the patients with late PUVs are challenging. Voiding cystourethrogram (VCUG) is mainly practiced. In this study, we aimed to evaluate the children with late-presented PUVs, and the reliability of VCUG in this group.

Materials and Methods Between January 2003 and December 2017 records of patients who were diagnosed with late-presented PUVs were analyzed. Delayed presentation of PUV was defined as patients who were diagnosed and treated after infancy. Cases were examined in terms of age at diagnosis, presenting symptoms, urinalysis, urinary ultrasound, urodynamic studies, VCUG, and dimercaptosuccinic acid scintigraphy findings. Postoperative follow-up conditions were also assessed.

Results Seventeen boys were diagnosed with late-presented PUVs (mean age was 7.35 years). The most common symptoms at presentation were frequency (58.8%), day and nighttime incontinence (47%), and febrile urinary infection (41%). PUV was noted by VCUG in 10 patients alone. The classical sign of dilated posterior urethra was detected in 9 patients. The 10th patient had posterior urethral irregularity. Urethra could not be evaluated due to unsuccessful voiding in one patient. Six patients had normally appearing urethra on VCUG. Reflux was detected in nine (52.9%) patients.

Conclusion Late-presented PUVs may be missed on VCUG. Whether a PUV might be present is crucial in boys with a history of recurrent urinary infection, persistent reflux, and repetitive daytime incontinence. Based on our results, we conclude that cystoscopic examination should be preferred for those cases to diagnose PUVs regardless of VCUG results.

Keywords

late-presenting - posterior urethral valves - diagnosis - voiding cystourethrography - cystoscopy
 

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