Lobules are the part of the breast that produces milk. Lobular carcinoma in situ (LCIS) is when there are abnormal cells in the lobules of the breast. These abnormal cells do not grow in an uncontrolled way or spread to other parts of the body like cancer. But, LCIS is a risk factor for future
It is not clear what causes LCIS. It is likely due to a change in a gene.
LCIS is more common in premenopausal women who are between 40-50 years old.
LCIS does not have symptoms.
LCIS does not appear on imaging tests. It can’t be felt during a breast exam. It is usually found during a
of other nearby breast tissue.
LCIS does not require treatment.
Your doctor will monitor your breast for changes with:
Lobular carcinoma in situ (LCIS). American Cancer Society website. Available at: https://www.cancer.org/cancer/breast-cancer/non-cancerous-breast-conditions/lobular-carcinoma-in-situ.html. Updated September 20, 2017. Accessed January 29, 2018.
Venkitaraman, R. Lobular neoplasia of the breast. Breast J. 2010;16(5):519-528.
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