Ductal carcinoma in situ DCIS is a non-invasive breast cancer. The milk ducts are the canals that carry milk from the lobules to the nipple openings during breastfeeding. Without treatment, DCIS cells could progress to invasive cancer over time. About 15 percent of breast cancers in the U. Most cases of DCIS are in women over 50 .
Stage 1 Breast Cancer: Diagnosis, Treatments, and Prognosis
Lobular carcinoma in situ LCIS means that cells inside some of the breast lobules have started to become abnormal. LCIS It is not a cancer. The lobules are glands that make breast milk. The abnormal cells are all contained within the inner lining of the lobules. LCIS is also called lobular neoplasia.
Ductal carcinoma in situ DCIS means the cells that line the milk ducts of the breast have become cancer, but they have not spread into surrounding breast tissue. DCIS is considered non-invasive or pre-invasive breast cancer. But sometimes a mastectomy might be a better option. In breast-conserving surgery BCS , the surgeon removes the tumor and a small amount of normal breast tissue around it. Lymph node removal is not always needed with BCS, but it may be done if the doctor thinks the area of DCIS might also contain invasive cancer.
Lobular carcinoma in situ LCIS develops in a milk-producing gland lobule and does not spread into nearby breast tissue. Lobular carcinoma in situ LCIS is an uncommon condition in which abnormal cells form in the milk glands lobules in the breast. LCIS isn't cancer. But being diagnosed with LCIS indicates that you have an increased risk of developing breast cancer. LCIS usually doesn't show up on mammograms.