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Updated: Jul 3, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
Bilaterally obstructed ureteropelvic junction of the upper moieties in a complete duplex collecting system
Michael Jonathan R Latayan1, Jose Dante P Dator, Carlos Ramon N Torres
1Department of Urology, National Kidney and Transplant Institute, East Avenue, Diliman, 1101 Quezon City NCR, Philippines. kixlatayan@yahoo.com
Abstract:
Maternal ultrasound is a routine examination in prenatal evaluation. The number of fetal abnormalities detected has been increasing, and includes fetal hydronephrosis which is secondary to ureteropelvic junction obstruction in 80% of cases. We report a case of a 1-year-old female infant with hydronephrosis prenatally detected by ultrasound. After close postnatal follow-up and diagnosis, she eventually underwent a definitive reconstructive procedure. This is the first reported case of a bilateral ureteropelvic junction obstruction of the upper moieties of a duplex collecting system.
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