Fine-needle aspiration of the breast.

One of the numerous controversial issues related to the clinical management of breast cancer is the role of fine-needle aspiration (FNA). Despite its enthusiastic use in the diagnosis of thyroid nodules, its application to breast abnormalities has been accepted reluctantly. Breast FNA necessitates technical and interpretative skill and continual practice and is not 100% accurate. It also entails an additional, although moderate, expense. To assess the accuracy and determine the possible role of FNA at our institution, we performed both FNA and excisional biopsy in 100 unselected women with palpable breast nodules and correlated the cytologic and histologic findings. Our results were similar to those in previously published studies. FNA had a false-negative rate of 6%, no false-positive results, and an accuracy of 94%. After reviewing the potential assets and liabilities of this technique, we believe that breast FNA may add a measure of confidence in the diagnosis of benign breast lesions, provides a safeguard for preventing misdiagnosis of malignant lesions, and might expedite and reduce the cost of managing both primary and recurrent breast cancer.