The impact of tumor infiltrating lymphocytes (TILs) on survival was confirmed in various cancer types. Our study aims to investigate the prognostic role of TILs on survival in patients with primary and metastatic tumors in breast cancer patients. We retrospectively identified 29 patients with human epidermal growth factor receptor - 2 (HER2+) and HER2 - early breast cancer diagnosed between 2012 and 2018 at Institute of Oncology Prof. Dr. Al. Trestioreanu Bucharest and who subsequently experienced regional or distant recurrence confirmed by tumor biopsy/resection.