Our findings were partly similar to the Meyer et al. study [17], in which 29 HNSCC patients who underwent 3.0-T MRI were recruited to explore the correlations between ADC values and PD-L1 expression and found that ADC values (r=-0.38) and ADCmax (r=-0.35) were weakly correlated with PD-L1 immune cell score. This evidence concerns the gene CD274 and head and neck squamous cell carcinoma.