Would deflux material which is injected under the l ureter where it enters the bladder show up on a ct urogram as a possible ureteral malignancy?

Deflux: Yes, Deflux could produce a mass of material in the ureter which could mimic a ureteral tumor on CT scan.

Can create confusion: On CT, Deflux is fluid density & occasionally can calcify creating confusion with ureterocele or distal ureteral stone at the bladder base ureterovesicular junction. If the ct urogram (workup for hematuria) interpreting radiologist is not aware of this pertinent history of prior injection, it may create some confusion in interpretatation. Make sure to Inform the radiologist about this history!