Are urachal remnants really rare in children? An observational study


Urachal remnants are thought to have a low prevalence. However, recent studies indicate a higher rate. The aim of this study was to evaluate the prevalence of urachal remnants in children referred for imaging by abdominal/urinary/suprapubic ultrasonography in one calendar year. Files of children who underwent abdominal/urinary/suprapubic ultrasonography in one calendar year were retrospectively reviewed. Data regarding children ≤17 years that underwent ultrasonography of the ventral abdominal wall while being assessed for various reasons were collected. Anomalies detected, age, gender, reason for ultrasonography request, and diagnosis of the urachal remnant were noted. All ultrasonography assessments were performed by a single pediatric radiologist in a single institution. There were 4836 patients in the study (1919 boys). Median age of the whole cohort was 7 years. A total of 10 patients were found to have urachal remnants, which included eight urachal cysts (three boys) and two urachal diverticula (one boy).

Conclusion: The prevalence of urachal remnants in our cohort was nearly 2 in every 1000 children. More specifically, the prevalence of urachal cysts was one in 600.

What is Known:
Urachal remnants were believed to be rare.
Recent studies indicated a higher incidence than previous reports.
What is New:
This study shows that urachal remnant may be observed in one every 500 children that undergo ultrasonography of the abdomen for various reasons.
Parental counselling and management of urachal remnants should be planned accordingly.

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Fig. 1





Urachal remnant




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Data and material of the study is stored in a database and can be shared upon request.

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Both authors contributed equally for this study.

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Correspondence to Muhammet İrfan Dönmez.

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Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Approval for this study was obtained from Necmettin Erbakan University Institutional Board (18.10.2019-2019/2127).

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The authors declare no competing interests.

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Communicated by: Gregorio Paolo Milani

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Keçeli, A.M., Dönmez, M.İ. Are urachal remnants really rare in children? An observational study. Eur J Pediatr (2021).

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  • Urachus
  • Remnant
  • Ultrasonography
  • Prevalence
  • Urachal