The study is planned over an 18 month period of time, to collect urine from 100 patients followed up at Rennes Hospital center for bladder cancer treatment and from a reference pool of 100 patients cured for kidney stones. All donors will be cognizant volunteers, adult from both genders. Minors, pregnant or breast feeding women, protected adults, patients also treated for other cancers, or the ones treat with a "double J" probe will not be included into the study.