? Wondering WHY I was not given RADS..

[Soccermom]

Dear ladies (and gents)
I have been reading about so many (with similar tumor profiles)that received radiation after their masts. I am wondering (better late than never I suppose) WHY I didnt have rads? My largest tumor was located next to my chest wall and prior to masts my surgeon had said that he might have to remove the tissue beneath the skin and in front of the ribcage (fascia). In the end he did not ,but I was left with skin so thin that the slightest scratch causes to bleed.
I know he had no alternative...but am still wondering about what the criteria for recieving rads is/was? I am sure my Onc told me at the time,but as with all things pre chemo,its a bit of a blur.

Thanks for your responses!
Marcia