Hi Slabman,
I don·t think the tumour itself, or the TURB physically cause fatigue, unless there may have been considerable blood loss. I presume your bloodwork prior to TURB showed adequate iron levels.However, coping mentally with the diagnosis of cancer definitely can cause anxiety and depression which in turn causes fatigue. At first, I don·t think one hour in the day went past without my thinking about it, but it gets better with time. What I found increased my energy levels was actually exercising more ! Daft though it may sound !I would check with your doctor that you are not anaemic, and that there is no reason why you shouldn·t up your exercise, but I can definitely reccomend it.
Cheers Flamenco