If a ureter is partially damaged, it can be bypassed with a nephroureteral stent, but if it needs to be removed, then options such a psoas hitch or transureteroureterostomy can be considered.

If the entire ureter needs to be removed, then an ileal ureter interposition can be considered. Colon could also potentially be used. In a way, the interposition graft concept is a variant of neobladder (such as an ileal conduit), except it is creation of a neo-ureter.

A ileal ureter interposition can be evaluated with

• CT urography
• intravenous urography
• radionuclide studies
• ultrasound
• cystography

Complications of an ileal interposition include mucus formation and stone formation in the ileal segment.