Upper pole pelviureteric junction obstruction
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Updated: Oct 30, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
P A Dewan1, E Penington, D Jeyaseelan
1Urology Unit, Royal Children's Hospital, Victoria, Australia.
Abstract:
A case of neonatal hydronephrosis affecting the upper moiety of a duplex kidney is presented. In addition to the ectopic insertion of the upper-pole ureter into the urethra, the ureter was obstructed by the lower pole at its pelviureteric junction.
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