Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer.
Most women diagnosed with this noninvasive breast cancer are alive 10 years later, and better treatments are emerging. For the 62, women who will be diagnosed with ductal carcinoma in situ DCIS this year, the good news is far more important than the bad. While cancer is never a picnic, DCIS is the earliest detectable form of the disease.
Ductal carcinoma in situ DCISalso known as intraductal carcinomais a pre-cancerous or non-invasive cancerous lesion of the breast. In DCIS, abnormal cells are found in the lining of one or more milk ducts in the breast. In situ means "in place" and refers to the fact that the abnormal cells have not moved out of the mammary duct and into any of the surrounding tissues in the breast "pre-cancerous" refers to the fact that it has not yet become an invasive cancer.
Each breast contains 15 to 20 lobes of glandular tissue, arranged like the petals of a daisy. The lobes are further divided into smaller lobules that produce milk for breast-feeding. Small tubes ducts conduct the milk to a reservoir that lies just beneath your nipple.
In DCIS, the abnormal cells are contained in the milk ducts canals that carry milk from the lobules to the nipple openings during breastfeeding. DCIS is also called intraductal within the milk ducts carcinoma. Learn about treatment for early breast cancer.
Biopsies are done only to make the diagnosis. If DCIS is diagnosed, more surgery is needed to ensure all of the cancer is removed along with "clear margins," which means that a border of healthy tissue around the cancer is also removed. Usually this means having lumpectomy, or in some cases a large area of DCIS, for examplemastectomy.
DCIS is diagnosed when the cells that line the milk ducts turn malignant, but are unable to penetrate through the wall of the duct noninvasiveso cannot get into the lymph nodes or blood stream. There is currently controversy about whether DCIS should be called breast cancer at all. DCIS has no accompanying symptoms.
If you're struggling to find what you need, call our Support line on 7 days a week, 8am-8pm. Information and support for people affected by ductal carcinoma in situ DCIS. Karen talks about her experience of living with breast cancer and how it affected her finances. About our cancer information videos.
August 26,by NCI Staff. Ductal carcinoma in situ, or DCIS, is a noninvasive condition in which abnormal cells are found in the lining of a breast duct. A new study suggests that women who are diagnosed with abnormal cells in the lining of a breast duct—a noninvasive condition called ductal carcinoma in situ, or DCIS—generally have a low risk of dying from breast cancer.