CD4 and neoplasm: This is likely due to differences in relative immune proportion in the tumor RNA-seq sample, as we observed TIL PD-L1 IHC was modestly correlated with RNA-estimated immune proportion (P = 0.0083, ⍴ = 0.18), CD4 expression (P = 0.00083, ⍴ = 0.22) and CD8 expression (P = 6.1e-5, ⍴ = 0.26).