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KEY FACTS
Terminology
Imaging
Pathology
Clinical Issues
TERMINOLOGY
Abbreviations
- Ureteropelvic junction (UPJ) obstruction
Synonyms
- Pelviureteric obstruction
Definitions
- Variable degree of blockage to urine flow at level of UPJ
- Most common urinary tract obstruction in pediatrics
- May be diagnosed antenatally with sonography or present in infancy or later childhood with UTI, intermittent abdominal pain, vomiting, hematuria
- Occasionally found incidentally during trauma work-up
IMAGING
General Features
Radiographic Findings
Ultrasonographic Findings
Fluoroscopic Findings
CT Findings
MR Findings
Nuclear Medicine Findings
Other Modality Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Natural History & Prognosis
Treatment
Selected References
- Senol C et al: Changes in Cajal cell density in ureteropelvic junction obstruction in children. J Pediatr Urol. 12(2):89.e1-5, 2016
- Brucher N et al: Non-contrast-enhanced MR angiography using time-spin labelling inversion pulse technique for detecting crossing renal vessels in children with symptomatic ureteropelvic junction obstruction: comparison with surgical findings. Eur Radiol. 26(8):2697-704, 2015
- Li R et al: Diagnosis and management of ureteral fibroepithelial polyps in children: a new treatment algorithm. J Pediatr Urol. 11(1):22.e1-6, 2015
- Parikh KR et al: Pediatric ureteropelvic junction obstruction: can magnetic resonance urography identify crossing vessels? Pediatr Radiol. 45(12):1788-95, 2015
- Cutroneo G et al: Altered cytoskeletal structure of smooth muscle cells in ureteropelvic junction obstruction. J Urol. 185(6):2314-9, 2011
- Mei H et al: Laparoscopic versus open pyeloplasty for ureteropelvic junction obstruction in children: a systematic review and meta-analysis. J Endourol. 25(5):727-36, 2011
- Samarasekera D et al: Endopyelotomy still has an important role in the management of ureteropelvic junction obstruction. Can Urol Assoc J. 5(2):134-6, 2011
- Wu Z et al: Novel method for double-J stenting in retroperitoneal laparoscopic dismembered pyeloplasty. Urology. 77(2):354-6, 2011
- Baek M et al: Long-term outcomes of dismembered pyeloplasty for midline-crossing giant hydronephrosis caused by ureteropelvic junction obstruction in children. Urology. 76(6):1463-7, 2010
- Szavay PO et al: Functional outcome after laparoscopic dismembered pyeloplasty in children. J Pediatr Urol. 6(4):359-63, 2010
- Richstone L et al: Pathologic findings in patients with ureteropelvic junction obstruction and crossing vessels. Urology. 73(4):716-9; discussion 719, 2009
- VanderBrink BA et al: Reconstructive surgery for lower pole ureteropelvic junction obstruction associated with incomplete ureteral duplication. J Pediatr Urol. 5(5):374-7, 2009
- Khaira HS et al: Helical computed tomography for identification of crossing vessels in ureteropelvic junction obstruction-comparison with operative findings. Urology. 62(1):35-9, 2003
- Brkljacic B et al: Doppler sonographic renal resistance index and resistance index ratio in children and adolescents with unilateral hydronephrosis. Eur Radiol. 12(11):2747-51, 2002
- Rooks VJ et al: Extrinsic ureteropelvic junction obstruction from a crossing renal vessel: demography and imaging. Pediatr Radiol. 31(2):120-4, 2001
- Frauscher F et al: Crossing vessels at the ureteropelvic junction: detection with contrast-enhanced color Doppler imaging. Radiology. 210(3):727-31, 1999
- Amling CL et al: Renal ultrasound changes after pyeloplasty in children with ureteropelvic junction obstruction: long-term outcome in 47 renal units. J Urol. 156(6):2020-4, 1996
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Pathology
Clinical Issues
TERMINOLOGY
Abbreviations
- Ureteropelvic junction (UPJ) obstruction
Synonyms
- Pelviureteric obstruction
Definitions
- Variable degree of blockage to urine flow at level of UPJ
- Most common urinary tract obstruction in pediatrics
- May be diagnosed antenatally with sonography or present in infancy or later childhood with UTI, intermittent abdominal pain, vomiting, hematuria
- Occasionally found incidentally during trauma work-up
IMAGING
General Features
Radiographic Findings
Ultrasonographic Findings
Fluoroscopic Findings
CT Findings
MR Findings
Nuclear Medicine Findings
Other Modality Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Natural History & Prognosis
Treatment
Selected References
- Senol C et al: Changes in Cajal cell density in ureteropelvic junction obstruction in children. J Pediatr Urol. 12(2):89.e1-5, 2016
- Brucher N et al: Non-contrast-enhanced MR angiography using time-spin labelling inversion pulse technique for detecting crossing renal vessels in children with symptomatic ureteropelvic junction obstruction: comparison with surgical findings. Eur Radiol. 26(8):2697-704, 2015
- Li R et al: Diagnosis and management of ureteral fibroepithelial polyps in children: a new treatment algorithm. J Pediatr Urol. 11(1):22.e1-6, 2015
- Parikh KR et al: Pediatric ureteropelvic junction obstruction: can magnetic resonance urography identify crossing vessels? Pediatr Radiol. 45(12):1788-95, 2015
- Cutroneo G et al: Altered cytoskeletal structure of smooth muscle cells in ureteropelvic junction obstruction. J Urol. 185(6):2314-9, 2011
- Mei H et al: Laparoscopic versus open pyeloplasty for ureteropelvic junction obstruction in children: a systematic review and meta-analysis. J Endourol. 25(5):727-36, 2011
- Samarasekera D et al: Endopyelotomy still has an important role in the management of ureteropelvic junction obstruction. Can Urol Assoc J. 5(2):134-6, 2011
- Wu Z et al: Novel method for double-J stenting in retroperitoneal laparoscopic dismembered pyeloplasty. Urology. 77(2):354-6, 2011
- Baek M et al: Long-term outcomes of dismembered pyeloplasty for midline-crossing giant hydronephrosis caused by ureteropelvic junction obstruction in children. Urology. 76(6):1463-7, 2010
- Szavay PO et al: Functional outcome after laparoscopic dismembered pyeloplasty in children. J Pediatr Urol. 6(4):359-63, 2010
- Richstone L et al: Pathologic findings in patients with ureteropelvic junction obstruction and crossing vessels. Urology. 73(4):716-9; discussion 719, 2009
- VanderBrink BA et al: Reconstructive surgery for lower pole ureteropelvic junction obstruction associated with incomplete ureteral duplication. J Pediatr Urol. 5(5):374-7, 2009
- Khaira HS et al: Helical computed tomography for identification of crossing vessels in ureteropelvic junction obstruction-comparison with operative findings. Urology. 62(1):35-9, 2003
- Brkljacic B et al: Doppler sonographic renal resistance index and resistance index ratio in children and adolescents with unilateral hydronephrosis. Eur Radiol. 12(11):2747-51, 2002
- Rooks VJ et al: Extrinsic ureteropelvic junction obstruction from a crossing renal vessel: demography and imaging. Pediatr Radiol. 31(2):120-4, 2001
- Frauscher F et al: Crossing vessels at the ureteropelvic junction: detection with contrast-enhanced color Doppler imaging. Radiology. 210(3):727-31, 1999
- Amling CL et al: Renal ultrasound changes after pyeloplasty in children with ureteropelvic junction obstruction: long-term outcome in 47 renal units. J Urol. 156(6):2020-4, 1996
