Ductal carcinoma in situ (DCIS) is a non-invasive cancer where abnormal cells have been found in the lining of the breast milk duct. The atypical cells have not spread outside of the ducts into the surrounding breast tissue.
You may hear the terms â€œpre-invasiveâ€ or â€œpre-cancerousâ€ to describe DCIS. DCIS is treated to try to prevent the development of invasive breast cancer.
Ductal carcinoma in situ (DCIS) is a kind of breast cancer that has not spread into nearby breast tissue. It's sometimes called a pre-cancer. Learn more about .