Related Experiment Video
Updated: Aug 8, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
Mild dilatation of renal pelvis in term neonates with urinary tract infection
H D Dellagrammaticas1, N Iacovidou, M Papadimitriou
1NICU, 2nd Department of Paediatrics, University of Athens, Aglaia Kyriakou Children's Hospital, Athens, Greece.
The purpose of this study was to assess the incidence and evolution of mild dilatation confined to the renal pelvis in term neonates with urinary tract infection developing within 2 weeks from birth. Twenty-two neonates with mild dilatation of the renal pelvis out of 180 neonates with urinary tract infection were identified giving an incidence of 12.2% for this finding. Male to female ratio was 6.3:1. The left kidney was twice as frequently involved (68 vs. 32%). At follow-up, the dilatation had disappeared in 20 neonates (90.9%) by a mean age of 2.7 years with only one neonate developing two further episodes of urinary tract infection in the infantile period. No other morbidity was noted.
The purpose of this study was to assess the incidence and evolution of mild dilatation confined to the renal pelvis in term neonates with urinary tract infection developing within 2 weeks from birth. Twenty-two neonates with mild dilatation of the renal pelvis out of 180 neonates with urinary tract infection were identified giving an incidence of 12.2% for this finding. Male to female ratio was 6.3:1. The left kidney was twice as frequently involved (68 vs. 32%). At follow-up, the dilatation had disappeared in 20 neonates (90.9%) by a mean age of 2.7 years with only one neonate developing two further episodes of urinary tract infection in the infantile period. No other morbidity was noted.
More Related Videos
Related Concept Videos
Urinary Tract Infection I: Introduction
Urinary Tract Infection II: Pathophysiology
Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care
Acute Pyelonephritis I: Introduction
Acute Pyelonephritis II: Diagnostic Studies and Management
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

