Tumor-Infiltrating lymphocytes and its relationship with survival in a series of primary breast cancer patients according to the different surrogated molecular subtypes

Introduction: Tumor-Infiltrating Lymphocytes (TILS) is a well-known predictor of response to primary chemotherapy1,2 and a good prognostic factor for survival in breast different subtypes3. In SABCC20214 we presented data on the relationship between TILs cut-off 20% and pCR (15.6% vs 41.4%, p = 0.0001). In the present study we have analyzed the association of the level of TILs cut-off 20% and survival in the different molecular subtypes at 5 and 10 years.