Cas I had a stent placed in for 2 weeks at the time of my first turb also because of the tumor location. I also had another in for 7 weeks after a second turb. I had no back pain, however because of the location, scar tissue and reaction to BCG, (formed like a pile of crust on top of the tumor site) the stent was necessary. There was no subsequent tumor that was causing the problems.
Joe