Thanks Stuart. Yes so often prostate cancer is portrayed as "old men moaning about going to the loo", often I'm afraid, coupled with "now you know what we women have to go through". It's not. It's the second most common cancer in men, easily treated if caught early, but not screened for and as a result 359,000 men each year die of it. In the developed world it is the most common cancer in males. Message to all the men on here: if you're going to the loo more often, particularly at night, or more urgently, get yourself checked. If you've had a father with it, either parent with breast cancer or any sibling with either, go and camp out on the doctor's doorstep.
The support group I belong to has mainly survivors and some of them are still affected in various ways 10 years or more later. Of course for the two of us that are terminal it is a bit different and I will echo Stuart's comment that it really knocked the stuffing out of us. Best wished to your F-i-L.