Urine extravasation secondary to upper urinary tract obstruction

Area of Science:

• Neonatal urology
• Pediatric nephrology
• Congenital urinary tract anomalies

Background:

• Ureteropelvic junction (UPJ) obstruction is a common congenital anomaly.
• Perirenal urine leakage (extravasation) is a rare complication, typically associated with lower urinary tract obstruction in neonates.
• Renal salvage strategies are crucial for preserving kidney function in infants.

Observation:

• A case of spontaneous perirenal urine leakage in a neonate with UPJ obstruction is presented.
• This is the first reported instance of such extravasation linked to an upper urinary tract obstruction.
• The neonate underwent successful renal salvage, preserving kidney function.

Findings:

• Spontaneous perirenal urine leakage can occur secondary to upper tract obstruction, specifically UPJ obstruction.
• The presence of extravasation in this context does not contraindicate primary reconstructive surgery.
• Successful renal salvage was achieved, highlighting the feasibility of intervention.

Implications:

• This case expands the understanding of urinary extravasation in neonates, linking it to upper tract anomalies.
• It suggests that prompt diagnosis and surgical intervention can lead to favorable outcomes in UPJ obstruction with extravasation.
• The findings support the consideration of primary reconstruction even in the presence of urine leakage, challenging previous assumptions.