Prognostic factors in breast cancer: Use of cytologic preparations

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Abstract
There is increasing evidence that certain morphological features and biological markers found in breast tumors may provide prognostic information by predicting the risk of recurrence and metastasis in early breast cancer. This information may also be important in choosing therapeutic options in patients with advanced disease. Prognostic testing is commonly performed on surgically excised lesions. However, there are clinical conditions in which a surgical specimen may not be suitable or available for such analysis. In these circumstances, fine‐needle aspiration biopsy and imprint preparation provide an attractive sample for prognostic testings. This review summarizes the current approach to the use of cytologic preparation for assessment of established and newly recognized prognostic factors.