Prostate cancer metastasis typically occurs in the bones, lymph nodes, lungs, liver and brain. It is that last possibility that gingers up the UK CAA somewhat. I think it is true to say that the authority is pretty relaxed about prostate cancer that has not yet escaped from the prostatic capsule. Actually and come to think of it, the UK CAA is pretty decent altogether when it comes to cancer and having bits chopped out of one whilst maintaining, with occasional periods of set aside, a Class I medical.