I agree with John. This would be a good place for a color doppler.
These aren't available everywhere, so you may have to travel a little to get one.
Second opinions are a good idea for cases like this that show a high core percentage, and particulary from a radiation oncologist or a prostate cancer oncologist. You will find many men on here who say the surgeon recommends surgey and the radiation guy recommends radiation. Hopefully a prostate oncologist is a more neutral person.
Just be sure you take the time to understand your cancer, your treatment options, potential side effects, and 5 and 10 year prognosis rates.
Good luck. Oh, and take a deep breath. This is not a death sentence. Statistically you have a high percentage chance of a long life.
Goodlife