针吸(FNA)细胞学对诊断可触知与乳腺X射线造影术可发现的乳腺病变而言是一项有用的技术。左边可见低倍放大的松散的细胞群；右边可见高倍放大的癌的异型核特征。 Fine needle aspiration (FNA) cytology is a useful technique for diagnosis of palpable and mammographically detectable breast lesions. Seen on the left at low magnification are discohesive clusters of cells; on the right at high magnification the atypical nuclei characteristic for a carcinoma are present.