Re: Itchy, dry patch of skin on breast...
I would just suggest going to see either a dermatologist or your OBGY-N just to be sure. Wouldn't you rather be safe than sorry. Breast cancer is nothing to sit on your hands and wait it out about. If you are concerned go get it checked out and possibly have your mind put at ease. Especially since the particular breast cancer you mentioned is fairly new. Don't wait. The sooner, the better. I don't know enough about that particular cancer to be able to ease your mind. But, if it were me, I would get it checked out before you could say, hmmm.
Also, you may want to look at the posts on the breast cancer portion of this site. I think there is one. Just check under Health Issues. There should be either a Breast Cancer forum or just a Cancer forum.
Take care and keep in touch.