Which complication would be associated with retroperitoneal fibrosis?

Retroperitoneal fibrosis can encase and compress the ureters, leading to obstructive uropathy and hydronephrosis. It may also involve other retroperitoneal structures but hydronephrosis is the most common significant complication.

According to Rumack’s Diagnostic Ultrasound:

“Retroperitoneal fibrosis frequently results in ureteral obstruction, leading to hydronephrosis.”