Lobular Carcinoma in Situ
(LCIS)
Definition
Lobular carcinoma in situ (LCIS) is when there are abnormal cells in the lobules of the breast. The lobules are the part of the breast that produces milk. LCIS is not cancer. However, it can raise the risk of future breast cancer.
Causes
It is not clear what causes LCIS. It is likely due to a change in a gene.
Risk Factors
LCIS is more common in premenopausal women between 40 to 50 years old.
Symptoms
LCIS does not have symptoms.
Diagnosis
LCIS does not appear on imaging tests. It cannot be felt during a breast exam. It is usually found during a biopsy of other nearby breast tissue.
Treatment
LCIS does not require treatment.
The doctor will monitor the breast for changes with:
- A physical and breast exam every 6 to 12 months
- A yearly mammogram
Prevention
The risk of breast cancer may be reduced by:
- Reaching and keeping a healthy weight
- Regular physical activity
- Eating a healthful diet
- Avoiding alcohol or—or limiting it to 1 drink or less per day
RESOURCES:
https://www.cancer.org
https://www.cancer.gov
References:
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Accessed March 19, 2021.
Last Updated: 3/19/2021
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