Lobules are small round sacs in the breast that produce milk.
When abnormal cells grow inside the lobules, but have not spread to nearby tissue or beyond, the condition is called lobular carcinoma in situ (LCIS).
Although the term LCIS includes the word “carcinoma,” LCIS is not breast cancer. However, LCIS increases the risk of breast cancer.
Learn more about LCIS and breast cancer risk.
Benign breast conditions (also known as benign breast diseases) are noncancerous disorders of the breast. They can occur in both women and men.
Some benign breast conditions cause discomfort or pain and need treatment. Others don’t need treatment.
Many benign breast conditions mimic the warning signs of breast cancer and need tests (and sometimes a biopsy) for diagnosis.
Learn more about benign breast conditions in women.
Learn more about benign breast conditions in men.
Learn About Breast Anatomy
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