PD-1, PD-L1 and CTLA-4 in pregnancy-related - and in early-onset breast cancer: A comparative study

Our results suggest that PRBC and YWBC do not differ in the expression of PD-1, PD-L1 and CTLA-4. However, our findings emphasize the relevance of PD-L1 expression in early-onset breast cancer, as an independent negative predictor of prognosis.