Hi Norine
Sorry to hear your news. I am guessing you and your husband are finding things really hard. The five years will likely be a 50 probability of survival, the nurse will not have all your husbands notes and may be being conservative. The bone scan is excellent news.
My wife and I were devastated when I was diagnosed with locally advanced prostate cancer. I was immediately put on hormone therapy tablets to stop any further prostate cell growth. I had an MRI scan, a biopsy and a bone scan to determine this.
Surgery was not an option and was told that high dose brachytherapy + 15 sessions of external beam radio therapy and at least 2 year hormone therapy gave the least side effects. I had to wait at least 3 months for the tumours to shrink so there was a smaller target. It did not matter if it was 3 or 12 months until the radiotherapy as the hormone therapy stopped all prostate cell growth
It was the day after by 57th birthday in Jan 2016. It took at least 4 months for me to get some focus on other things so it did not dominate my thoughts. It may be better for your husband.
I have been told by the oncologist I have a 66% chance of surviving 10 years and 33% chance of a complete cure. I saw him within 1 month of diagnosis. I am relatively young and fit, the figures are for all age groups, so I think my odds are better than those quoted.
I found the Macmillan centre at the local hospital to be brilliant. On the day of the diagnosis, I remember the quiet and comfort of their sitting area, after the bustle of the hospital was good and the tea they offered that day was the best one I have had for a long time.
Macmillan will probably offer free counselling to you and / or your husband. I found invaluable this to come to terms with things. A sounding board for all the difficult thoughts feelings you have that you don't want to share with your husband as it may distress him further.
Take care of where you find your information. The oncologist should have the best idea of your personal situation Prostate UK main site is excellent as is Macmillan and Cancer Research UK not forgetting the NHS for generic information.
Things look pretty black now but they will improve as you get more information