Dotsie, I'm thinking good thoughts and just know your sister will be OK. Tell her I said so cuz I'm an expert on all this, OK? DCIS (ductal carcinoma in situ) is a very early stage disorder and has a fantastic cure rate if treated early. I had a lot of DCIS in addition to the tumor, but hopefully the chemo and radiation blasted it all out. And for those who don't know, chemo is almost never recommended for "just" DCIS. Usually radiation and sometimes local surgery, depending on spread and size.