NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,442 terms related to cancer and medicine.
We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.
- breast carcinoma in situ
- listen (brest KAR-sih-NOH-muh in SY-too)
A condition in which abnormal cells are found in the tissues of the breast. There are 2 types of breast carcinoma in situ: ductal carcinoma in situ (DCIS) and Paget disease of the nipple. DCIS is a condition in which the 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. Paget disease of the nipple is a condition in which abnormal cells are found in the skin cells of the nipple and may spread to the areola. Patients with Paget disease of the nipple may also have DCIS or invasive breast cancer in the same breast. Also called stage 0 breast carcinoma in situ.