Appearances of the circumcaval ureter on excretory urography and MR urography: A single-center case series
A 12-year-old boy was incidentally found to have right hydronephrosis on routine sonography, and the left kidney was not visualized. An excretory urogram showed grade 3 hydronephrosis on the right, with a dilated proximal ureter and a short distal medialized segment. There was no excretion on the left side. MRU confirmed a solitary right kidney with grade 3 hydronephrosis, and the acute medialization was seen to be due to the ureter winding around the IVC at L3 vertebral level. The patient, being asymptomatic, was not operated, and is on regular sonographic follow-up.