• Bmc Med · Aug 2015

    Review

    Relevance of tumor-infiltrating lymphocytes in breast cancer.

    • Sathana Dushyanthen, Paul A Beavis, Peter Savas, Zhi Ling Teo, Chenhao Zhou, Mariam Mansour, Phillip K Darcy, and Sherene Loi.
    • Division of Research and Cancer Medicine, Peter MacCallum Cancer Centre, East Melbourne, VIC, Australia.
    • Bmc Med. 2015 Aug 24; 13: 202.

    AbstractWhile breast cancer has not been considered a cancer amenable to immunotherapeutic approaches, recent studies have demonstrated evidence of significant immune cell infiltration via tumor-infiltrating lymphocytes in a subset of patient tumors. In this review we present the current evidence highlighting the clinical relevance and utility of tumor-infiltrating lymphocytes in breast cancer. Retrospective and prospective studies have shown that the presence of tumor-infiltrating lymphocytes is a prognostic marker for higher responses to neoadjuvant chemotherapy and better survival, particularly in triple negative and HER2-positive early breast cancer. Further work is required to determine the immune subsets important in this response and to discover ways of encouraging immune infiltrate in tumor-infiltrating lymphocytes-negative patients.

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