Ureteral fibroepithelial polyp causing urinary obstruction.
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.
UCSF School of Medicine, UCSF Medical Center, San Francisco, CA, USA.
Melissa L
ML
Shive
Laurence S
LS
Baskin
Catherine R
CR
Harris
Michael
M
Bonham
John D
JD
MacKenzie
D002114:Calcinosis / Q000000981:diagnostic imaging* / Q000473:pathology; D002648:Child; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging*; D007682:Kidney Pelvis / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D011127:Polyps / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology
fibroepithelial polyp; pediatric; ureteral polyp; ureteropelvic junction obstruction