CD8A and neoplasm: Immune checkpoint inhibitors (ICIs) targeting the Programmed cell death protein 1/Programmed cell death protein ligand 1 (PD-1/PD-L1) pathway have shown promise in advanced TC, potentially benefiting from frequent PD-L1 overexpression and abundant CD8+ tumor-infiltrating lymphocytes (TILs), despite typically low tumor mutational burden (TMB).