Okay...WELL...I happen to be friends with a Cancer Research Scientist...I know random people in my life...
anyhow I just called him and when I told him what it was he immediately said "Oh, that's the good kind...if you are going to get a cancer, this is the type to get..."
Then he got all clinical and said:
In situ (noninvasive) breast cancer refers to cancer in which the cells have remained within their place of origin — they haven't spread to breast tissue around the duct or lobule. The most common type of noninvasive breast cancer is ductal carcinoma in situ (DCIS), which is confined to the lining of the milk ducts. The abnormal cells haven't spread through the duct walls into surrounding breast tissue. With appropriate treatment, DCIS has an excellent prognosis.
SO...I hope this helps a bit. I know how scary it is to even HEAR cancer.
hugs and prayers to you and yours!!