Role of needle localization of nonpalpable breast lesions.

This study of 89 women who underwent 100 consecutive needle localization procedures for nonpalpable breast lesions revealed a 19 percent malignancy rate. These lesions tended to be small and had a 6.2 percent incidence of nodal metastasis. Needle localization also identified 19 additional patients who were at increased risk for invasive breast cancer. The procedure was effective, well tolerated, carried a low morbidity, and resulted in the removal of a minimal amount of breast tissue. It must be emphasized that although mammography and needle localization are useful tools, they are only adjuncts to breast self-examination and clinical observation.