Comparison of tumor microenvironment in primary and paired metastatic ER+/HER2- breast cancers: Results of a pilot study

Tumor microenvironment (TME) is a dynamic setting and changes in TILs and their subpopulations are potential candidates to influence the metastatic process. Aim of this pilot study is to describe the changes occurring between primary breast cancers and their paired metastases in terms of TILs composition.