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KEY FACTS
Imaging
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Urinary tract dilation (UTD)
Synonyms
- Pelviectasis, pyelectasis, hydronephrosis
Definitions
- Renal collecting system distended with urine
- Mild UTD may be isolated transient finding
- Renal pelvis often 1st structure to dilate
- Variety of causes
- Renal collecting system distended with urine
IMAGING
General Features
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
- Gray MC et al: Assessment of urinary tract dilation grading amongst pediatric urologists. J Pediatr Urol. 16(4):457.e1-6, 2020
- Nelson CP et al: Interobserver reliability of the antenatal consensus classification system for urinary tract dilatation. J Ultrasound Med. 39(3):551-7, 2020
- Braga LH et al: Society for Fetal Urology classification vs urinary tract dilation grading system for prognostication in prenatal hydronephrosis: a time to resolution analysis. J Urol. 199(6):1615-21, 2018
- Mileto A et al: Fetal urinary tract anomalies: review of pathophysiology, imaging, and management. AJR Am J Roentgenol. 210(5):1010-21, 2018
- Braga LH et al: Associations of initial Society for Fetal Urology grades and urinary tract dilatation risk groups with clinical outcomes in patients with isolated prenatal hydronephrosis. J Urol. 197(3 Pt 2):831-7, 2017
- Chow JS et al: Classification of pediatric urinary tract dilation: the new language. Pediatr Radiol. 47(9):1109-15, 2017
- Kaspar CDW et al: The antenatal urinary tract dilation classification system accurately predicts severity of kidney and urinary tract abnormalities. J Pediatr Urol. 13(5):485.e1-7, 2017
- Chalmers DJ et al: Inter-rater reliability of the APD, SFU and UTD grading systems in fetal sonography and MRI. J Pediatr Urol. 12(5):305.e1-5, 2016
- Nguyen HT et al: Multidisciplinary consensus on the classification of prenatal and postnatal urinary tract dilation (UTD classification system). J Pediatr Urol. 10(6):982-98, 2014
- American Institute of Ultrasound in Medicine: AIUM practice guideline for the performance of obstetric ultrasound examinations. J Ultrasound Med. 32(6):1083-101, 2013
- Hadar E et al: Sonographic evaluation of kidney parenchymal growth in the fetus. Arch Gynecol Obstet. 286(4):867-72, 2012
- Keays MA et al: Reliability assessment of Society for Fetal Urology ultrasound grading system for hydronephrosis. J Urol. 180(4 Suppl):1680-2; discussion1682-3, 2008
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References
Tables
Tables
KEY FACTS
Imaging
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Urinary tract dilation (UTD)
Synonyms
- Pelviectasis, pyelectasis, hydronephrosis
Definitions
- Renal collecting system distended with urine
- Mild UTD may be isolated transient finding
- Renal pelvis often 1st structure to dilate
- Variety of causes
- Renal collecting system distended with urine
IMAGING
General Features
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
- Gray MC et al: Assessment of urinary tract dilation grading amongst pediatric urologists. J Pediatr Urol. 16(4):457.e1-6, 2020
- Nelson CP et al: Interobserver reliability of the antenatal consensus classification system for urinary tract dilatation. J Ultrasound Med. 39(3):551-7, 2020
- Braga LH et al: Society for Fetal Urology classification vs urinary tract dilation grading system for prognostication in prenatal hydronephrosis: a time to resolution analysis. J Urol. 199(6):1615-21, 2018
- Mileto A et al: Fetal urinary tract anomalies: review of pathophysiology, imaging, and management. AJR Am J Roentgenol. 210(5):1010-21, 2018
- Braga LH et al: Associations of initial Society for Fetal Urology grades and urinary tract dilatation risk groups with clinical outcomes in patients with isolated prenatal hydronephrosis. J Urol. 197(3 Pt 2):831-7, 2017
- Chow JS et al: Classification of pediatric urinary tract dilation: the new language. Pediatr Radiol. 47(9):1109-15, 2017
- Kaspar CDW et al: The antenatal urinary tract dilation classification system accurately predicts severity of kidney and urinary tract abnormalities. J Pediatr Urol. 13(5):485.e1-7, 2017
- Chalmers DJ et al: Inter-rater reliability of the APD, SFU and UTD grading systems in fetal sonography and MRI. J Pediatr Urol. 12(5):305.e1-5, 2016
- Nguyen HT et al: Multidisciplinary consensus on the classification of prenatal and postnatal urinary tract dilation (UTD classification system). J Pediatr Urol. 10(6):982-98, 2014
- American Institute of Ultrasound in Medicine: AIUM practice guideline for the performance of obstetric ultrasound examinations. J Ultrasound Med. 32(6):1083-101, 2013
- Hadar E et al: Sonographic evaluation of kidney parenchymal growth in the fetus. Arch Gynecol Obstet. 286(4):867-72, 2012
- Keays MA et al: Reliability assessment of Society for Fetal Urology ultrasound grading system for hydronephrosis. J Urol. 180(4 Suppl):1680-2; discussion1682-3, 2008
