Needle localization of nonpalpable breast lesions.

Mammographic identification of nonpalpable breast lesions suspicious for malignancy constitutes a valid indication for breast biopsy but localization is difficult. Percutaneous needle localization of such lesions, whether clustered microcalcifications, small masses, or focal areas of distorted mammary architecture, is an effective aid to the surgeon. The authors' experience in more than 80 cases is described and the necessity for specimen radiography is emphasized.