For B7-H3, our TMA data clearly confirm high expression in HNSCC tumors, in agreement with previous studies (Hu et al. 2019), with overall slightly more than 60% of samples categorized as strong, while mostly weak or absent staining was observed in the normal tissue control spots (Fig. 2B, Supplementary Fig. 1). This evidence concerns the gene CD276 and head and neck squamous cell carcinoma.