About one-quarter of all breast cancer diagnoses are early stage cancers that are confined to the lobule or duct where they originated. These cancers are called non-invasive breast cancer or carcinoma in situ. The most common form of non-invasive breast cancer is ductal carcinoma in situ (DCIS) — an early stage breast tumor confined to a duct.
A less common form is lobular carcinoma in situ (LCIS) — a carcinoma that is confined to a lobule. Many experts do not regard LCIS as a true cancer, but it is a risk factor for developing invasive breast cancer.
In the Breast Cancer Program, we evaluate your diagnosis and determine the breast cancer treatment that is best for you.