Appearances of the circumcaval ureter on excretory urography and MR urography: A single-center case series
A 25-year-old man presented to the emergency department with acute severe right flank pain for a day and history of similar milder pain for the last year. Ultrasound revealed right hydroureteronephrosis with proximal ureteric calculus. IVU showed right grade 4 hydronephrosis with a calculus overlying the pedicle of L3 vertebra. CT showed right hydronephrosis with renal and proximal ureteric calculi, but the intimate relation of ureter and IVC raised the possibility of a circumcaval ureter. MRU unequivocally depicted the circumcaval course of the ureter and two calculi proximal to the obstruction [].