The tumor microenvironment (TME) plays a crucial role in modulating immune responses in lung cancer. A study highlighted the importance of fibroblastic reticular cells (FRCs) in creating protective T cell environments within lung tumors, where their ablation led to decreased antitumor T cell activity and reduced tumor control during immunotherapy (ref: Onder doi.org/10.1016/j.cell.2024.10.042/). Additionally, single-cell RNA sequencing revealed significant heterogeneity in immune microenvironments associated with ground-glass nodules (GGN) and part-solid nodules (PSN) in lung adenocarcinoma, indicating that the interactions between tumor-associated macrophages and tumor cells vary during the metastatic process (ref: Ren doi.org/10.1186/s12943-024-02177-7/). Furthermore, research has shown that a subset of neutrophils can activate antitumor immunity, suggesting that their plasticity and function in the TME are critical for non-small cell lung cancer (NSCLC) progression (ref: Tang doi.org/10.1016/j.devcel.2024.10.010/). Contradictory findings emerged regarding the role of hypoxia, which was linked to acquired resistance to immune checkpoint inhibitors, highlighting a complex interplay between tumor microenvironmental factors and therapeutic outcomes (ref: Robles-Oteiza doi.org/10.1084/jem.20231106/).