Jeong et al identified factors associated with a stent failure for a patient with malignant ureteric obstruction. The authors are from the National Cancer Center in Goyang, Korea.


Patient selection: malignant ureteric obstruction due to external compression by a non-urologic malignancy


Risk factors for stent insertion failure:

(1) male gender (possibly related to the additional insertion length required because of the male urethra)

(2) evidence of bladder invasion on cystoscopic exam


A patient at high risk for stent insertion failure may benefit from percutaneous nephrostomy rather than a ureteral stent.


Other observations:

(1) metallic stents may have a higher rate of migration into the bladder

(2) inserting 2 ipsilateral stents can be done but is technically challenging


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