The International Academy of Cytology Yokohama System for Reporting Breast Fine Needle Aspiration Biopsy Cytopathology. Introduction and Overview.- Insufficient/Inadequate.- Benign.- Atypical.- Suspicious of Malignancy.- Malignant.- An Approach to the Interpretation of Breast Fine Needle Aspiration Biopsy Cytology Direct Smears.- Nipple Cytology.- Role of Ancillary Tests in Breast Fine Needle Aspiration Biopsy Cytology.- Fine Needle Aspiration Biopsy Cytology of the Breast Utilizing Liquid-based Preparations.- Clinical Management.