The utility of retrograde pyelography to follow up incompletely opacified ureters on CT urography

ConclusionThere is a relatively low yield for detecting ureteral abnormalities when a retrograde pyelogram is performed after a CTU to evaluate an incompletely opacified ureteral segment —2.7% in our study, with only two of these incompletely opacified segments containing urothelial cancer (1.4%). In these two cases, a ureteral abnormality was visible on the CTU and RPG would seem to have a very low yield for follow up of unopacified ureteral segments if the ureters are otherwis e normal-appearing on CTU and there is no hydronephrosis.
Source: Abdominal Imaging - Category: Radiology Source Type: research