lobular carcinoma in situ


non·in·fil·trat·ing lob·u·lar car·ci·no·ma

carcinoma of the breast in which small tumor cells fill preexisting acini within lobules, without invading the surrounding stroma. Synonym(s): lobular carcinoma in situ, lobular neoplasia

lobular carcinoma in situ

Atypical lobular hyperplasia, LCIS Oncology A precancerous epithelial lesion of the female breast;1⁄3 of those with LCIS develop invasive CA; 8% of LCIS do not form a discrete mass. Cf Ductal carcinoma in situ.