PDCD1 and neoplasm: Among the overexpressed signatures, we identified substantial enrichment in immune‐related pathways, including IDO1 (Indoleamine 2,3‐dioxygenase 1), TIGIT (T cell immunoreceptor with Ig and ITIM domains), Treg (Regulatory T cell), TIS (Tumor Inflammation Signature), CD8 (Cluster of differentiation 8 lymphocyte marker), PD‐1 (Programmed cell death protein 1), inflammatory chemokines, IFN‐γ (Interferon gamma), PD‐L1 (Programmed death‐ligand 1), PD‐L2 (Programmed death‐ligand 2) and macrophages.