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J Radiol Case Rep. 2012 Jul;6(7):23-8. doi: 10.3941/jrcr.v6i7.1076. Epub 2012 Jul 1.

Ureteral fibroepithelial polyp causing urinary obstruction.

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  • 1UCSF School of Medicine, UCSF Medical Center, San Francisco, CA, USA.


Ureteral polyps are rare causes of ureteropelvic junction (UPJ) obstruction, particularly in children. We report a nine year-old boy with UPJ obstruction initially suggestive of an obstructive urinary stone. CT showed intraureteral calcification at the UPJ and hydronephrosis. A retrograde pyelogram showed narrowing at the UPJ and partial obstruction that was found to be a ureteral polyp. This case illustrates a rare cause of UPJ obstruction that should be considered when the imaging findings and presentation are atypical for more common etiologies of ureteral obstruction.


fibroepithelial polyp; pediatric; ureteral polyp; ureteropelvic junction obstruction

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