Is Ductal Carcinoma In Situ (DCIS) Breast Cancer? (March 2013)
What is ductal carcinoma in situ (DCIS)?
Ductal carcinoma in situ (DCIS) is breast cancer, but it is non-invasive (stage 0). “Ductal” means “related to the milk ducts” and “in situ” means "in place." With DCIS, the cancer cells are contained within the milk ducts. Because the cancer cells have not invaded nearby breast tissue, DCIS is not invasive breast cancer.
This is how it was explained to me,but I know opinions vary.