I have MS and have had my SP cath now for a little more than 4 years. Other than what I feel are "typical" issues with it - UTIs, and once had it pushed in too far and the tip embedded into bladder wall, causing it to irritate and block up - it has been relatively uneventful. I had a cystoscopy back when it blocked up, and it has been a little over 2 years since. I had the scope repeated a few months later to make sure everything healed alright, and to just double check that the irritation of the bladder lining was just temporary due to the misplacement of the catheter (versus being due to something more serious like the beginning of a tumor forming). Everything looked great.
As I said before, I haven't really had any other atypical issues. The only other minor issue I can think of is that I had to have some extra flap of skin burned off that was overgrowing near the stoma and causing problems during cath changes. It healed nicely and the extra skin only grew back minimally, not causing enough problems to warrant another visit.
I've heard some discussion about people with SP caths, and I seem to recall that it is recommended to have occasional cystoscopies to check things out. How often should that be, especially if a person isn't having obvious problems? And what exactly are they checking for - the beginnings of cancer?