question: I have noticed very light spots of blood on occasion in underwear. Not a daily occurrence. Am 70 now and had 81 I125 seeds implanted for prostate cancer in 2007. PSA at that time had gone up to 5.83. Ever since PSA has not been significant enough to even register. Last test was 4 months ago. Don t feel there is anything to be worried about but would like to know in the event I m wrong. Thanks.