lobular carcinoma in situ

Definition of lobular carcinoma in situ
National Cancer Institute

lobular carcinoma in situ

(LAH-byoo-ler KAR-sih-NOH-muh in SY-too)
A condition in which abnormal cells are found in the lobules of the breast. This condition seldom becomes invasive cancer. However, having lobular carcinoma in situ in one breast increases the risk of developing breast cancer in either breast. Also called LCIS.

Source: NCI Dictionary of Cancer Terms