Noninvasive breast cancer often has no signs or symptoms. Find out how doctors diagnose DCIS and learn about treatment, including mastectomy Increasing age; Personal history of benign breast disease, such as atypical.
Invasive ductal breast cancer occurs when abnormal cells break out of the milk cancer is actually present and, if so, the extent of the disease.
About 1 in 5 new breast cancers will be ductal carcinoma in situ (DCIS). DCIS is also called intraductal carcinoma or stage 0 breast cancer. DCIS is a non-invasive or pre-invasive breast cancer.