First things first!
If you have obstructive voiding symptoms (slow stream, hesitancy, getting up at night, stop start stream, decrease in caliber of stream) and want to do radiation as your treatment of your prostate cancer it is okay to have the prostatic urethra opened by the Greenlight laser before the treatment to prevent exacerbation of your voiding symptoms after radiation. It is not advisable to do any surgical treatment of the prostate after radiation treatment of the prostate. Trust me.
It is better to cure at the beginning than at the end….my friend.