Appearances of the circumcaval ureter on excretory urography and MR urography: A single-center case series
A 40-year-old woman presented with right flank pain and fever for 2 weeks. Ultrasound showed right hydronephrosis with moving internal echoes, suggesting pyonephrosis. Urine culture was positive for gram-negative bacilli. Excretory urography done after treatment of the infection showed right-sided grade 3 hydronephrosis with a “reverse J” configuration of the dilated system. MRU images and MIP reconstructions showed a similar appearance, but axial sections clearly depicted a circumcaval course of the ureter.