ACCURACY OF STEREOTACTIC CORE-NEEDLE BREAST BIOPSY IN ATYPICAL DUCTALHYPERPLASIA

BACKGROUND: The histologic diagnosis of atypical ductal hyperplasia (A DH) has been reported as having a high rate of malignancy, either duct al carcinoma in situ (DCIS) or invasive ductal carcinoma (IDC). We rev iewed our surgical group's experience with stereotactic core-needle bi opsies (SCNB), specifically looking at the follow-up of ADH. METHODS: From November 1994 through July 1997 our group performed 539 SCNB. Twe nty-one patients (4%) were diagnosed as ADH. Eighteen patients had sub sequent wire-localized excisional biopsies. Three patients were follow ed up mammographically. One patient refused follow-up. RESULTS: Of the 18 patients who underwent excisional biopsies, 2 patients were found to have DCIS and 1 patient had lobular carcinoma in-situ. There were n o cases of IDC. CONCLUSION: Our results show a much lower incidence of malignancy in cases of ADH found on SCNB than has been previously rep orted. While the standard of care is still to follow up ADH found on S CNB with excisional biopsy, more data may justify following up certain subsets of patients. (C) 1998 by Excerpta Medica, Inc.