Glossary
Ductal carcinoma in situ
(DUK-tul KAR-sih-NOH-muh in SY-too)
A condition in which abnormal cells are found in the lining
of a breast duct. The abnormal cells have not spread
outside the duct to other tissues in the breast. In some
cases, ductal carcinoma in situ may become invasive breast
cancer and spread to other tissues. At this time, there is
no way to know which abnormal cells could become
invasive. Also called DCIS and intraductal breast carcinoma.
Definition from the National Cancer Institute’s NCI Dictionary of Cancer Terms.