For the past six months, at least, I have white blood cells in my urine. Three courses of antibiotics have not cleared it so my GP sent me to a urologist, when I told him I was on Cell Cept he said more tests were needed, I also told him I was due to have a total knee replacement in September his response was "that won't be done due to the risk of infection". I had previously asked my GP who said it wouldn't make any difference. I realise it will be up to my orthopaedic surgeon but as I really need this done but I wondered if anyone could advise me as to the risks involved. I have GCA and PMR diagnosed over six years ago which is under control. Thank you.