A similar study conducted by the same group depicted the landscape of infiltrating T cells in non-small cell lung cancer by analyzing 12,346 T cells from 14 patients, demonstrating 16 main T cell subsets including 7 CD8+ T cell subsets, 7 conventional CD4+ T cell subsets, and 2 regulatory T cell (Tregs) subsets (Guo et al., 2018). The gene discussed is CD8A; the disease is non-small cell lung carcinoma.