Since July 1992 to September 1993,57 breast lesions were identified by mam- mography in 56 patients. Fine-needle aspiration cytology was performed on 55 lesions by us- ing a stereotaxic localization technique (10/55 lesions were nonpalpable). Fine-needle aspira- tion cytology has a sensitivity of 92.5%, a specificity of 100%, and an accuracy of 96.3%, The diagnostic sensitivity and specificity of mammogram with stereotaxic fine-needle aspiration cytology test were 100% respectively. 6 nonpalpable breast lesions were excised by using stereotaxic localization technique.