Hi, I don’t know if this helps, but I’ll give you my take on the situation re: radiotherapy.
I found the Lump in March, and also aware of a small lump in armpit at the same time, and long story cut short, in May I had surgery - WLE and axillary node clearance, Grade 3 Invasive Ductal, with some DCIS ‘admixed’, ER8, eleven nodes removed and one node showed positive, my margins were not great . . .
Chemo was suggested - both before and after - and I was adamant that I would not have chemo. (Purely personal decision, I have never ‘agreed’ with chemo as a treatment, before, during, or after this was all going on - for me, but i have every respect and admiration for those who do have chemo). So ‘the deal’ was that WLE went hand in hand with the radiotherapy - particularly so for me because my margins were minimal ( no more tissue to take ) and the 1 lymph node issue. And it really was ‘a deal’ because I knew that without the R/T I was really taking further risks (after refusing chemo). I regarded the R/T as necessary for, hopefully, ‘mopping up’. ( The oncologist thought I was wrong to refuse chemo, I know ).
I had 20 zaps - the 15 standard treatment, and the 5 boosters to the area where Lump was. I didn’t have it directed underarm because I’d had the clearance.
I don’t know if any of that helps? I’m also (reluctantly) on Letrozole, been taking for about 2 months now - I am not sure if it is giving me many side effects yet, as I am prone to aches and pains at my age (63) - and I am keeping an eye on my weight as I spent 2 years getting it where I felt comfortable before all this kicked off.
I guess this is the price we pay these days for being ‘active’ in our own treatments, whereas years ago, people were possibly more inclined to do ‘as advised and prescribed because doctor knows best’. it’s a know win sometimes isn’t it - and never easy. When my surgeon discussed my results with me, I think he gauged the sort of person I was, explaining that because of the very narrow margins, almost non-existent on one side, with no further tissue available to take, that there was the possibility This could return in the area of the Lump. I had refused chemo, and he was being honest, and making clear why R/T really was, in his opinion, necessary.
I wish you all the best x