caa a22 4500 475755448 CHVBK 20180406123536.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1007/s002470050032 doi (NATIONALLICENCE)springer-10.1007/s002470050032 Single-system ureteroceles in infants and children: imaging features [Elektronische Daten] [J. M. Zerin, D. R. Baker, J. A. Casale] Purpose. The purpose of this manuscript is to describe the clinical and imaging findings in children who have single-system ureteroceles. Materials and methods. We reviewed the urology records and imaging studies in 32 consecutive infants and children who were diagnosed in our department with single-system ureteroceles. Results. There were 35 ureteroceles in the 32 patients - 29 were unilateral (14 right-sided, 15 left-sided) and 3 were bilateral. Twenty-five patients were boys (78 %) and 7 girls. Mean age at presentation was 0.7 years (0-9.2 years). Prenatally detected hydronephrosis or cystic renal dysplasia was the most common presentation (24 patients). Four presented with urinary infection, 2 with abdominal mass, 1 had myelomeningocele, and 1 had hypospadias. Three patients also had multiple non-urologic, congenital anomalies. Thirty-three ureteroceles were intravesical, and 2 were ectopic to the bladder neck. Twenty-four ureteroceles were associated with ipsilateral hydroureteronephrosis and 10 with ipsilateral multicystic dysplastic kidney. One patient had a normal ipsilateral kidney and a contralateral multicystic dysplastic kidney. The ureterocele was identified on at least one imaging study in each patient. Sixteen ureteroceles (47 %) everted at VCUG, mimicking paraureteral diverticula. Other variations included ureterocele prolapse and inadvertent ureterocele catheterization (1 each). Conclusions. Single-system ureterocele is an important, although uncommon cause of hydronephrosis and renal dysplasia in infants and children. Single-system ureterocele is distinguished clinically from the more common duplex-system ureterocele by its frequent occurrence in boys and its association with multicystic dysplastic kidney. Because these ureteroceles are frequently small and have a propensity to evert at VCUG, they can be mistaken for paraureteral diverticula. Springer-Verlag Berlin Heidelberg, 2000 Zerin J. M. Department of Radiology, Indiana University Medical Center, James Whitcomb Riley Hospital for Children, Indianapolis, IN 46202-5200, USA, IN aut Baker D. R. Department of Radiology, Indiana University Medical Center, James Whitcomb Riley Hospital for Children, Indianapolis, IN 46202-5200, USA, IN aut Casale J. A. Department of Urology, Indiana University Medical Center, James Whitcomb Riley Hospital for Children, Indianapolis, IN 46202-5200, USA, IN aut https://doi.org/10.1007/s002470050032 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s002470050032 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zerin J. M. Department of Radiology, Indiana University Medical Center, James Whitcomb Riley Hospital for Children, Indianapolis, IN 46202-5200, USA, IN aut NATIONALLICENCE 700 1- Baker D. R. Department of Radiology, Indiana University Medical Center, James Whitcomb Riley Hospital for Children, Indianapolis, IN 46202-5200, USA, IN aut NATIONALLICENCE 700 1- Casale J. A. Department of Urology, Indiana University Medical Center, James Whitcomb Riley Hospital for Children, Indianapolis, IN 46202-5200, USA, IN aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer