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Review
. 2022 Apr;52(4):740-751.
doi: 10.1007/s00247-021-05263-w. Epub 2022 Jan 4.

2021 update on the urinary tract dilation (UTD) classification system: clarifications, review of the literature, and practical suggestions

Hiep T Nguyen  1 , Andrew Phelps  2 , Brian Coley  3 , Kassa Darge  4 , Audrey Rhee  5 , Jeanne S Chow  6
Affiliations
Review

2021 update on the urinary tract dilation (UTD) classification system: clarifications, review of the literature, and practical suggestions

Hiep T Nguyen et al. Pediatr Radiol. 2022 Apr.

Abstract

In 2014, a multidisciplinary consensus on the classification of pre- and postnatal urinary tract dilation (UTD classification) was developed. Its goal was to provide a standardized system for evaluating and reporting urinary tract dilation both in the prenatal and postnatal periods. In this review, we summarize insights learned from the implementation of the UTD classification system since its inception, providing clarifications on common points of confusion. In addition, we review current literature in the clinical validation of the UTD classification system to provide credence for its use in managing fetuses and children with urinary tract dilation.

Keywords: Children; Classification; Hydronephrosis; Kidneys; Postnatal; Prenatal; Ultrasound; Urinary tract; Urinary tract dilation.

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References

    1. Nguyen HT, Benson CB, Bromley B et al (2014) Multidisciplinary consensus on the classification of prenatal and postnatal urinary tract dilation (UTD classification system). J Pediatr Urol 10:982–998 - DOI
    1. Chow JS, Koning JL, Back SJ et al (2017) Classification of pediatric urinary tract dilation: the new language. Pediatr Radiol 47:1109–1115 - DOI
    1. Calle-Toro JS, Maya CL, Gorfu Y et al (2020) Supine versus prone positioning for ultrasound evaluation of postnatal urinary tract dilation in children. Pediatr Radiol 50:357–362 - DOI
    1. Back SJ, Christopher Edgar J, Weiss DA et al (2018) Rater reliability of postnatal urinary tract dilation consensus classification. Pediatr Radiol 48:1606–1611 - DOI
    1. Kenney IJ, Negus AS, Miller FN (2002) Is sonographically demonstrated mild distal ureteric dilatation predictive of vesicoureteric reflux as seen on micturating cystourethrography? Pediatr Radiol 32:175–178 - DOI

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