Hi Alison,
I have been told that the blood that I had in my pee recently was most likely due to late effects of my radiotherapy in Oct 2014.
I was quite surprised because it was the first time the bladder had caused any problems as a result of my treatment, it had always been the bowel that had seemed to be effected.
Hopefully, for your husband, it will turn out to be a side effect, and not anything more serious.
Worth checking out though.
Steve