Özet:

Background:Breast cancer is most common cancers in reproductive women and also the leading cause of cancer deaths worldwide. First line of invasive investigation of breast lump is Fine needle aspiration cytology (FNC) to categorized the lesion as benign or malignant. Recently, an expert panel published [International Academy of Cytology](IAC) Yokohama System for reporting and classification of breast lump cytopathology. The aim of the present study was to evaluate the applicability of Yokohama system of classification and reporting. 

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