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 abnormal cell change found in the milk glands (lobules) of the breast. LCIS is not cancer and the abnormal cells don't spread beyond the lobules. But having LCIS makes you more likely to develop breast cancer later in life.

LCIS usually doesn't cause any symptoms or show up on a mammogram. In most cases, it's found during a breast biopsy done for another problem.

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