Hi,
I am sorry to hear that your sister had
to battle
breast cancer at the age of 28.
Breast cancer in younger women tends
to be more agressive than that occuring in the older age group.
The fact that she had bilateral synchronous cancers at a young age is worrying. However, if a full oncologic surgery is complete, along with chemo and now radiation, then I can assume that she is being treated with a curative intent. Also, you mentioned that she will be put on hormones.