Because the concept of tumor-specific production of IFN-γ is poorly described and controversial (33), we evaluated histology available in the Human Protein Atlas and discovered that in 3 of the 6 histological samples from patients with lung adenocarcinoma, IFN-γ could be detected within the tumor cells as defined within that database (Supplemental Figure 5C). This evidence concerns the gene IFNG and lung adenocarcinoma.