In addition to resistance mechanisms, the tumor microenvironment plays a critical role in shaping responses to immunotherapy. Zhao et al. explored the activation of cancer-associated fibroblasts (CAFs) and their contribution to tumor growth and metastasis in NSCLC, identifying the FAP/IL-6 axis as a key mediator (ref: Zhao doi.org/10.1186/s12943-024-01957-5/). This suggests that targeting the fibroblast niche may represent a novel therapeutic strategy. Moreover, a systematic review by Sorin et al. on neoadjuvant chemoimmunotherapy revealed that patients with low PD-L1 expression could benefit from this approach, indicating a potential shift in treatment paradigms for NSCLC (ref: Sorin doi.org/10.1001/jamaoncol.2024.0057/). The interplay between immune-related adverse events (irAEs) and treatment efficacy was further investigated by Haratani et al., who found that irAEs could predict progression-free survival in patients receiving durvalumab after chemoradiotherapy, highlighting the dual role of immune activation in both therapeutic response and toxicity (ref: Haratani doi.org/10.1038/s41416-024-02662-2/). Together, these findings underscore the multifaceted nature of immunotherapy in lung adenocarcinoma, where understanding resistance mechanisms and the tumor microenvironment is crucial for optimizing treatment outcomes.