Informed consent requires physicians to let you know all the negative outcome possibilities, no matter how rare. It's difficult not to individualize this information and fear that this will happen in your particular case. The overwhelming odds are that it won't.
If you've ever read the fine print on any medications that you are taking, the list of all the bad things that could happen can scare you to death, but in spite of that, the odds are low that the medication will cause any problems. It is perfectly natural to be fearful and apprehensive.
We're scared because we've been diagnosed with prostate cancer. We're fearful of the unknown and question whether we've made the right decision regarding treatment. And we're frightened that the surgery or other treatment will have an adverse outcome. Plus, there is plenty of free-floating anxiety regarding the numerous issues related to our prognosis and secondary effects.
Take care and hang in there...Tim