Our objective is to assess the effect of duration of ureteral rest, defined as time from conversion of ureteral stent to percutaneous nephrostomy, on stricture length prior to ureteral reconstruction surgery.

Inclusion Criteria:

• >18 years of age
• Undergoing ureteral reconstruction surgery for ureteral stricture with conversion of an indwelling stent to a percutaneous nephrostomy tube for ureteral rest
• Willing to sign informed consent form
• Able to read and understand informed consent form

Exclusion Criteria:

• <18 years of age
• Inability to provide informed consent
• Members of vulnerable patient populations

Subjects over 18 years of age undergoing surgery to fix the ureter.