Ureteropelvic junction obstruction in lower pole moiety of duplex kidney
Diagnosis certain
Presentation
Left loin pain
Patient Data
Age: 25 years
Gender: Female
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Cystic mass at lower pole of left kidney
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Delayed 20 minutes post-injection of contrast, imaged supine and prone.
Duplex left collecting system with a ureteropelvic junction (UPJ) obstruction in the lower pole moiety - no ureter identified in the lower pole. Non-filling of lower pole ureter even in the prone position.
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Pre-operative MAG3 nuclear renogram: delayed filling and emptying of left lower pole moiety.
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Post-pyleoplasty MAG3 renogram: filling and emptying of left lower pole moiety much improved after Lasix injection.
Post pyeloplasty MAG3 statistics: note rapid clearance from left kidney post-Lasix injection at 22 minutes