Large-core needle biopsy of nonpalpable breast lesions.

Abstract

An increasing number of nonpalpable abnormalities requiring breast biopsy are being identified due to the widespread use of screening mammography. Large-core needle biopsy (LCNB) has become an alternative to surgical excision. To determine whether LCNB is a safe and accurate technique to evaluate nonpalpable abnormalities found on breast imaging studies. Case series at an institutional referral center from August 1, 1991, to December 31, 1997. A total of 1643 women with 1 or more suspicious breast abnormalities received LCNBs (n = 1836 lesions). The LCNB of the breast uses a 14- or 11-gauge needle with stereotactic localization or ultrasound guidance. Utility and potential limitations of LCNB compared with the criterion standard, surgical excision after wire localization. Of the 1836 breast lesions sampled, 444 (24%) were found to be malignant. A total of 412 (22%) were found to be malignant on the initial LCNB and 202 repeat biopsies yielded 32 additional malignancies. Complications were infrequent: 1 patient experienced a superficial infection and 1 developed a pneumothorax after LCNB. Image-guided LCNB is a reliable diagnostic alternative to surgical excision of suspicious nonpalpable breast abnormalities.