Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Lobular carcinoma in situ (LCIS)

Lobular carcinoma in situ (LCIS) is a type of noninvasive breast cancer that is confined to the cells lining the very end of the milk ducts (lobules) in the breast. LCIS has some of the characteristics of cancer cells but does not invade surrounding breast tissue or other structures.

LCIS is usually located in more than one area in the breast (multicentric) and may be present in both breasts (bilateral). It is usually discovered by accident, in the process of obtaining a biopsy of the breast for another problem. It does not typically show up on a mammogram.

Experts disagree about whether LCIS is a preinvasive cancer or a marker for the later development of an invasive cancer. A woman with LCIS has an increased chance of having invasive breast cancer during her lifetime.

News & Events

View All

Travel Warnings and Tips for Pregnant Women

If you decide to vacation, visit old friends, or must travel for work, pregnancy shouldn’t stop you from flying or