Table 2. Prognostic role of PD‐L1 in untreated BC.

Abbreviations: BC, breast cancer; BCSS, breast cancer‐specific survival; DapB, dihydrodipicolinate reductase; DFS, disease‐free survival; DMFS, distant metastasis‐free survival; EBC, early breast cancer; FOVs, fields of view; HER2, human epidermal growth receptor 2; HPF, high‐power field; HR, hormone receptor; IBC, inflammatory breast cancer; IC, immune cells; IHC, immunohistochemistry; MFS, metastasis‐free survival; OS, overall survival; OSS, overall specific survival; PD‐L1, programmed cell death ligand 1; QIF, quantitative fluorescence; qPCR, quantitative polymerase chain reaction; qRT‐PCR, quantitative reverse transcription polymerase chain reaction; RFS, recurrence‐free survival; ROC, receiver operating characteristic; SISH, silver in situ hybridization; TC, tumor cells; TN, triple‐negative.