Association of PD-L1/CD8+TIL and expression of PD-L1, PTEN as predictive biomarkers for long-term follow-up in early breast cancer.

e12072Background: The aim of this study was to investigate the correlation of immunologic factors including the expression of PD-1/PD-L1, PTEN, and the density of TILs, macrophages in the tumor area of breast cancer, using immunohistological staining and to evaluate the association between the immunologic factors and the clinical outcome for early breast cancer (EBC). Methods: A total of 97 EBC patients (pts) who underwent surgery from February 1995 to November 2005 were investigated.The postoperative adjuvant chemotherapies were routinely performed, adjuvant Tmab were not available in Japan within this period.The immunohistological staining was performed with the monoclonal antibodies for PD-1/PD-L1, PTEN, CD3, CD8, and CD163. Pathological analysis was performed to measure the expression area of each antibody, using images scanned by a CCD digital camera (Nikon), and the digitized data of the expression area (μm2) were analyzed by ‘Win ROOF’ (version 5.7) software. The association between the immunologic...