By what you wrote, when he was peeing it was trickling out when he went to see the doctor, i think he possibly had the symptoms for quite a while before making that appointment.
I was at work one day a few years ago and was having to go to the toilet around every 20 minutes. I knew straight away what it was so went to the doctors who arranged a psa test. That came back at 5.7 so I had a biopsy which was negative. I've had two scans since and they test my PSA every six months. It fluctuates between 6-9, up and down. My consultant said I have a benign prostrate which can raise it. So long as it doesn't shoot up they'll just monitor it. Get checked pronto bloke's at the first sign.