Hi, sorry you need to ask thus. I had chemo ( docetaxl) for 6 sessions over 18 weeks on diagnosis, then a month iff and then 6 sessions of RT over 6 weeks. My onco said that there is some evidence that RT to the " mother ship" can reduce the pace oif subsequent PSA growth even though if one has advanced PC the cancer is already out so it sounds like your onco has the same view. My PC is in my lymphs so am t4 n1m1 a, it may be different if you have locally advanced PC but I guess the principal is the same.
As for side effects, the usual for chemo, hair loss, numb fingers and toes, black tongue initially , loss if taste, dried blood in my nose in the mornings, occasional feeling sick but tablets they gave me sorted that. I did manage to keep running and dud 2 marathons on weeks 13 and 15 of chemo. Side effects of RT, none for six months then radiation proctutus is bleeding bottom, not an issue but a bit concerning at first, quite minor.
I took the view, rightly or wrongly, that I know little about PC, personally I like to rake action do if the quack says he wants to do something there is usually good reason. I did ask lots if questions at the time about why thus course opposed to others I had read about and he explained reasons for everything which made me happy. My tumblr/ lymph glands shrunk from3.5cm to 0.5 cm after treatment which us normal size so it worked for me. I know it will come back but the smaller things are at that time the more chance the docs have to find another working solution.
Feel free to keep asking any questions to the forum.
Kev