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Intravenous urography before and 4 weeks after polytetrafluoroethylene membrane-covered self-expandable metallic (UVENTA) stent insertion to treat a right lower ureter obstruction due to local recurrence of right colon cancer. (A) Before UVENTA insertion. Note hydronephrosis in right kidney despite the double-J stent. (B) Four weeks after UVENTA insertion. The 8 cm-long UVENTA stent is in the right lower ureter. Hydronephrosis is no longer observed.
