I have a raised red patch on my bladder lining which is being investigated for cancer. For many years I had an enlarged prostate with a long finger-like  protrusion into the bladder (on the cystoscopy it looked like sea weed waving about in the bladder) but radiotherapy when my cancer reoccurred last year, plus ongoing hormone treatment, seems to have removed it. It strikes me that after at least seven or eight years, maybe even 15 or more, of this constantly growing protrusion  would have been severely stretched and probably permanently damaged the bladder wall. It seems logical to me that this could account for the raised red patch. Obviously I want a biopsy so that if I do have cancer it can be treated as soon as possible, but is my theory a possible explanation? Today I also have a trace of blood in my urine, which while not definitive makes me less sure that I'm right.