CD274 and neoplasm: ALC: absolute lymphocyte counts; cN: clinical nodal status; cT: clinical tumor size; HER2: human epidermal growth factor receptor 2; HG: histological grade; IC: immune cells; NAC: neoadjuvant chemotherapy; NLR: neutrophil-to-lymphocyte ratio; pCR: pathological complete response; PD-L1: programmed cell death ligand 1; TC: tumor cells; TILs: tumor-infiltrating lymphocytes