PediatrRadiol(2017)47:1216 DOI 10.1007/s00247-017-3924-8 LETTER TO THE EDITOR Hyun Gi Kim Received: 30 May 2017 /Accepted: 6 June 2017 /Published online: 2 August 2017 Springer-Verlag GmbH Germany 2017 Dear Editors, Urology grading system , so its usage would not be an First of all, I would like to thank Dr. Phelps and his col- arbitrary decision. leagues  for their comments on the article, “Conversion and Once again, I appreciate your efforts to make the new clas- reliability of two urological grading systems in infants: the sification system widely known to both radiologists and clini- cians and to make it clearly comprehensible and adaptable to Society for Fetal Urology and the urinary tract dilatation clas- sifications system” . clinical practice. His point regarding the differences between our illustration and the new illustration, which was vetted by the creators of Compliance with ethical standards the urinary tract dilation (UTD) classification system, is well understood. Our illustration was based on the original ultra- Conflicts of interest None sound images by Nguyen et al. . We interpreted Figs. 7a and b of their paper, which were sample images of UTD P1, as showing some fluid outlining the medullary pyramid. References However, it is now obvious that these images should not have been interpreted as such, and we expect that this kind of mis- interpretation will be eliminated with your new illustration. 1. Phelps AS, Chow JS, Back SJ et al (2017) Urinary tract dilation illustrations. Pediatr Radiol 47. doi:10.1007/s00247-017-3916-8 One other thing I would like to comment on is the usage of 2. Han M, Kim HG, Lee JD et al (2017) Conversion and reliability of the term “dilation” for calyces in the UTD classification sys- two urological grading systems in infants: the Society for Fetal tem. If the presence of fluid at the central or peripheral calyces Urology and the urinary tract dilatation classifications system. is the only matter of concern when grading, I cautiously sug- Pediatr Radiol 47:65–73 3. Nguyen HT, Benson CB, Bromley B et al (2014) Multidisciplinary gest using the term “visualization” instead of “dilation” to consensus on the classification of prenatal and postnatal urinary tract further decrease any possible confusion among users of the dilation (UTD classification system). J Pediatr Urol 10:982–998 UTD classification system. This is because we often use “di- 4. Fernbach S, Maizels M, Conway J (1993) Ultrasound grading of lation” when there is blunting of calyces. The term “visuali- hydronephrosis: introduction to the system used by the Society for zation” of calyces was originally used in the Society for Fetal Fetal Urology. Pediatr Radiol 23:478–480 * Hyun Gi Kim firstname.lastname@example.org Department of Radiology, Ajou University School of Medicine, Ajou University Medical Center, 164 World cup-ro, Yoengtong-gu, Suwon 443–380, Korea
Pediatric Radiology – Springer Journals
Published: Aug 4, 2017
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