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Lobular carcinoma in situ (LCIS) and atypical hyperplasias (AH)

Lobular carcinoma in situ (LCIS) is a non-invasive multicentric proliferation of atypical epithelial cells in the lobules and terminal ducts of the breast. Atypical lobular hyperplasia (ALH) describes cells similar to those seen in LCIS that only partially occlude the duct lumen and slightly distend the lobule.

The following guide, The clinical management of ductal carcinoma in situ, lobular carcinoma in situ and atypical hyperplasia of the breast, is designed to assist in decision making by women and their doctors.