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The Role of CTLA-4 in Breast Cancer: Implications for ImmunotherapyBreast cancer (BC) remains one of the most prevalent malignancies affecting women worldwide, with significant morbidity and mortality rates. As the understanding of cancer biology evolves, the role of the immune system in tumor progression and response to therapy has gained prominence. Recent research has identified CTLA-4 (Cytotoxic T-Lymphocyte Antigen 4) as a significant player in the immune response to breast cancer. This article explores the expression of CTLA-4 in breast cancer, highlighting its potential as a clinical marker and a target for immunotherapy, which could enhance treatment strategies for patients.Introduct …