Skin reactions to cystos

[vinnyp]

(I also posted this in the cancer and allergy forums)
I've had bladder cancer since 2000 and have undergone numerous cystos, TURBS, BCG/interferron treatments. Nothing in muscle, but just got a postive FISH. A couple of years back, I started getting rashes at the tip of my penis and above the anus immediately after each cysto. I told my urologist, who didn't have an answer and they continued after each cysto, getting worse and taking longer to resolve each time. We tried switching betadine with another prep solution; no effect. My urologist thinks it has nothing to do with the cystos and is fungal. I know it has something to do with the cystos. I asked my wife to examine me beforehand and afterwards. The rash appeared immediately after the cysto. My urologist prescribed an anti-fungal cream which I've been using for two days without much effect. The skin on my penis in two areas in purplish-black.On the advice of my GP,  I am going to see a dermatologist. My question: Could it be an allergic reaction to lidocaine? Or possibly the solution (Cidex?) they use to clean the scope? Have you heard of this type of reactions to cystos. This is really bothing me and interrupts my sex life and makes working out painful too.
One other issue: I get a lot of false-postive FISH tests, which lead to a biopsy, which eventualy leads to a "no cancer" report. I'm thinking of dropping the FISH test and just relying on cystos and NMP cytology tests. Is this advisable?
Thanks in advance

[vinnyp]

Thanks for responding.The cleaning solution angle is definitely worth checking out. I may need a new urologist, though. He doesn't seem too concerned about this problem. I definitely am concerned..

[keyzersoce]

I forgot to mention my uro also gives me an antibiotic(levacquin) after each cysto to prevent possible infection.

[keyzersoce]

I also get a cysto every three months after a couple of non-invasive bladder tumors. I've had the BCG treatments, mytomyicin, NMP22 test, etc. So far, no rash or tumor recurrance. However, one time, the nurse told me the cystoscope had been in the sterilizing solution too long and they couldn't use it. They're only supposed to put the scope in the solution for about 20 minutes before use. Maybe your doctor's office is over-sterilizing. If they just leave it to soak in the solution, it could be bothering you.

I asked my uro about the FISH test last time I was there. He said he doesn't like it for the reasons you mentioned plus he added it is rather expensive. There's another test called the AMAS Cancer test, but it is not widely known. Therefore, many doctors have not heard of it or will perform it. Same principle: detecting presence of cancer in your body. The problem is detecting the presence of a doctor or lab to do the test. I'm trying to find someone in my area.

Best of luck to you.