Pathologic Review of Atypical Hyperplasia Identified by Image-Guided Breast Needle Core Biopsy

Abstract Context.—Management of breast needle core biopsies diagnosed as atypical ductal hyperplasia, atypical lobular hyperplasia, and lobular carcinoma in situ is controversial. Current recommendations involve excisional biopsy to rule out ductal carcinoma in situ and/or invasive carcinoma, which have been reported in more than 50% of cases in some series. Objective.—To determine how frequently these diagnoses made on needle core biopsy are ultimately found to represent in situ or invasive carcinoma based on excisional biopsy specimens, in order to identify predictive factors. Design.—One thousand eight hundred thirty-six image-guided needle core biopsies were performed between January 1, 1995 and May 1, 2001. Fifty-four (2.9%) patients diagnosed with atypical ductal hyperplasia (n = 36), atypical lobular hyperplasia (n = 12), atypical ductal hyperplasia + atypical lobular hyperplasia (n = 3), or lobular carcinoma in situ (n = 3) subsequently underwent breast excisions. Pathologic features were reviewed...