Ureteropelvic duplication, duplicated kidney, duplex or bifid collecting system
Definitions
Presence of 2 separate pelvicalyceal collecting systems draining 1 kidney, which may join above bladder (partial/incomplete/bifid), drain into bladder separately (complete), or beyond bladder
IMAGING
General Features
Ultrasonographic Findings
Fluoroscopic Findings
Nuclear Medicine Findings
Radiographic Findings
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Calle-Toro JS et al: Morphologic and functional evaluation of duplicated renal collecting systems with MR urography: a descriptive analysis. Clin Imaging. 57:69-76, 2019
Didier RA et al: The duplicated collecting system of the urinary tract: embryology, imaging appearances and clinical considerations. Pediatr Radiol. 47(11):1526-38, 2017
Duran C et al: Contrast-enhanced voiding urosonography for vesicoureteral reflux diagnosis in children. Radiographics. 37(6):1854-69, 2017
Adeb M et al: Magnetic resonance urography in evaluation of duplicated renal collecting systems. Magn Reson Imaging Clin N Am. 21(4):717-30, 2013
Lipson JA et al: Subtle renal duplication as an unrecognized cause of childhood incontinence: diagnosis by magnetic resonance urography. J Pediatr Urol. 4(5):398-400, 2008
Wah TM et al: Lower moiety pelvic-ureteric junction obstruction (PUJO) of the duplex kidney presenting with pyonephrosis in adults. Br J Radiol. 76(912):909-12, 2003
Callahan MJ: The drooping lily sign. Radiology. 219(1):226-8, 2001
Zissin R et al: Renal duplication with associated complications in adults: CT findings in 26 cases. Clin Radiol. 56(1):58-63, 2001
Fernbach SK et al: Ureteral duplication and its complications. Radiographics. 17(1):109-27, 1997
Ulchaker J et al: The spectrum of ureteropelvic junction obstructions occurring in duplicated collecting systems. J Pediatr Surg. 31(9):1221-4, 1996
Bellah RD et al: Ureterocele eversion with vesicoureteral reflux in duplex kidneys: findings at voiding cystourethrography. AJR Am J Roentgenol. 165(2):409-13, 1995
Fernbach SK et al: Complete duplication of the ureter with ureteropelvic junction obstruction of the lower pole of the kidney: imaging findings. AJR Am J Roentgenol. 164(3):701-4, 1995
Husmann DA et al: Ureterocele associated with ureteral duplication and a nonfunctioning upper pole segment: management by partial nephroureterectomy alone. J Urol. 154(2 Pt 2):723-6, 1995
Share JC et al: The unsuspected double collecting system on imaging studies and at cystoscopy. AJR Am J Roentgenol. 155(3):561-4, 1990
Winters WD et al: Importance of prenatal detection of hydronephrosis of the upper pole. AJR Am J Roentgenol. 155(1):125-9, 1990
Share JC et al: Ectopic ureterocele without ureteral and calyceal dilatation (ureterocele disproportion): findings on urography and sonography. AJR Am J Roentgenol. 152(3):567-71, 1989
Ahmed S et al: Vesicoureteral reflux in complete ureteral duplication: surgical options. J Urol. 140(5 Pt 2):1092-4, 1988
Bisset GS 3rd et al: The duplex collecting system in girls with urinary tract infection: prevalence and significance. AJR Am J Roentgenol. 148(3):497-500, 1987
Mesrobian HG: Ureteropelvic junction obstruction of the upper pole moiety in complete ureteral duplication. J Urol. 136(2):452-3, 1986
Nussbaum AR et al: Ectopic ureter and ureterocele: their varied sonographic manifestations. Radiology. 159(1):227-35, 1986
Amis ES Jr et al: Lower moiety hydronephrosis in duplicated kidneys. Urology. 26(1):82-8, 1985
Gartell PC et al: Renal dysplasia and duplex kidneys. Eur Urol. 9(2):65-8, 1983
Inamoto K et al: Duplication of the renal pelvis and ureter: associated anomalies and pathological conditions. Radiat Med. 1(1):55-64, 1983
Gates GF: Ultrasonography of the urinary tract in children. Urol Clin North Am. 7(2):215-22, 1980
Rose JS et al: Ultrasound diagnosis of ectopic ureterocele. Pediatr Radiol. 8(1):17-20, 1979
Mascatello VJ et al: Ultrasonic evaluation of the obstructed duplex kidney. AJR Am J Roentgenol. 129(1):113-20, 1977
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KEY FACTS
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Imaging
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TERMINOLOGY
Synonyms
Ureteropelvic duplication, duplicated kidney, duplex or bifid collecting system
Definitions
Presence of 2 separate pelvicalyceal collecting systems draining 1 kidney, which may join above bladder (partial/incomplete/bifid), drain into bladder separately (complete), or beyond bladder
IMAGING
General Features
Ultrasonographic Findings
Fluoroscopic Findings
Nuclear Medicine Findings
Radiographic Findings
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Calle-Toro JS et al: Morphologic and functional evaluation of duplicated renal collecting systems with MR urography: a descriptive analysis. Clin Imaging. 57:69-76, 2019
Didier RA et al: The duplicated collecting system of the urinary tract: embryology, imaging appearances and clinical considerations. Pediatr Radiol. 47(11):1526-38, 2017
Duran C et al: Contrast-enhanced voiding urosonography for vesicoureteral reflux diagnosis in children. Radiographics. 37(6):1854-69, 2017
Adeb M et al: Magnetic resonance urography in evaluation of duplicated renal collecting systems. Magn Reson Imaging Clin N Am. 21(4):717-30, 2013
Lipson JA et al: Subtle renal duplication as an unrecognized cause of childhood incontinence: diagnosis by magnetic resonance urography. J Pediatr Urol. 4(5):398-400, 2008
Wah TM et al: Lower moiety pelvic-ureteric junction obstruction (PUJO) of the duplex kidney presenting with pyonephrosis in adults. Br J Radiol. 76(912):909-12, 2003
Callahan MJ: The drooping lily sign. Radiology. 219(1):226-8, 2001
Zissin R et al: Renal duplication with associated complications in adults: CT findings in 26 cases. Clin Radiol. 56(1):58-63, 2001
Fernbach SK et al: Ureteral duplication and its complications. Radiographics. 17(1):109-27, 1997
Ulchaker J et al: The spectrum of ureteropelvic junction obstructions occurring in duplicated collecting systems. J Pediatr Surg. 31(9):1221-4, 1996
Bellah RD et al: Ureterocele eversion with vesicoureteral reflux in duplex kidneys: findings at voiding cystourethrography. AJR Am J Roentgenol. 165(2):409-13, 1995
Fernbach SK et al: Complete duplication of the ureter with ureteropelvic junction obstruction of the lower pole of the kidney: imaging findings. AJR Am J Roentgenol. 164(3):701-4, 1995
Husmann DA et al: Ureterocele associated with ureteral duplication and a nonfunctioning upper pole segment: management by partial nephroureterectomy alone. J Urol. 154(2 Pt 2):723-6, 1995
Share JC et al: The unsuspected double collecting system on imaging studies and at cystoscopy. AJR Am J Roentgenol. 155(3):561-4, 1990
Winters WD et al: Importance of prenatal detection of hydronephrosis of the upper pole. AJR Am J Roentgenol. 155(1):125-9, 1990
Share JC et al: Ectopic ureterocele without ureteral and calyceal dilatation (ureterocele disproportion): findings on urography and sonography. AJR Am J Roentgenol. 152(3):567-71, 1989
Ahmed S et al: Vesicoureteral reflux in complete ureteral duplication: surgical options. J Urol. 140(5 Pt 2):1092-4, 1988
Bisset GS 3rd et al: The duplex collecting system in girls with urinary tract infection: prevalence and significance. AJR Am J Roentgenol. 148(3):497-500, 1987
Mesrobian HG: Ureteropelvic junction obstruction of the upper pole moiety in complete ureteral duplication. J Urol. 136(2):452-3, 1986
Nussbaum AR et al: Ectopic ureter and ureterocele: their varied sonographic manifestations. Radiology. 159(1):227-35, 1986
Amis ES Jr et al: Lower moiety hydronephrosis in duplicated kidneys. Urology. 26(1):82-8, 1985
Gartell PC et al: Renal dysplasia and duplex kidneys. Eur Urol. 9(2):65-8, 1983
Inamoto K et al: Duplication of the renal pelvis and ureter: associated anomalies and pathological conditions. Radiat Med. 1(1):55-64, 1983
Gates GF: Ultrasonography of the urinary tract in children. Urol Clin North Am. 7(2):215-22, 1980
Rose JS et al: Ultrasound diagnosis of ectopic ureterocele. Pediatr Radiol. 8(1):17-20, 1979
Mascatello VJ et al: Ultrasonic evaluation of the obstructed duplex kidney. AJR Am J Roentgenol. 129(1):113-20, 1977
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