I was diagnosed with cancer in the bladder and in the prostate in Sep 2008. I went to Audie Murphy and the VA removed both. I filed claim for agent orange exposure and was given a rateing of 100% plus SMC. In Dec of 2010 the VA gave me another C&P exam and a couple of weeks ago I get a letter from the VA stateing that since I no longer have cancer they are going to reduce my rating for exposure from 100% to 0% and discontinue the SMC. This is about $2000 per month. How do I fight this?