SLC7A5 and head and neck squamous cell carcinoma: Comparing the differences in patients with different states, we found that the subpopulation of TP63+ SLC7A5+ HNSCC subpopulation increased in abundance following immunotherapy compared with pre-immunotherapy levels and was more abundant in the immune non-responsive group than in the immune-responsive group (Figure 2B; Supplementary Figure S1B).