Neonatal uriniferous perirenal pseudocyst: image correlation

Area of Science:

• Pediatric Radiology
• Neonatal Imaging
• Urological Imaging

Background:

• Uriniferous perirenal pseudocyst (urinoma) is a rare collection of urine in the space around the kidney.
• It can occur in neonates due to urinary tract abnormalities.
• Ureteropelvic junction obstruction is a common congenital cause of neonatal hydronephrosis.

Observation:

• This case report focuses on a neonate diagnosed with a urinoma.
• The study details the diagnostic process using both scintigraphy and ultrasonography.
• The specific imaging characteristics observed in this patient are described.

Findings:

• Characteristic scintigraphic findings included evidence of urine extravasation around the kidney.
• Ultrasonography revealed a well-defined cystic collection consistent with a urinoma.
• The underlying cause identified was ureteropelvic junction obstruction in the affected kidney.

Implications:

• Accurate identification of urinoma through imaging is crucial for timely management in neonates.
• Understanding these imaging findings aids in differentiating urinoma from other neonatal abdominal masses.
• Early diagnosis and intervention for ureteropelvic junction obstruction can prevent long-term renal damage.