The tumor microenvironment plays a crucial role in immune evasion, particularly in glioblastoma and other malignancies. Research has shown that glioblastoma can induce significant changes in the immune landscape of the skull marrow, leading to the expansion of immunosuppressive myeloid cells and alterations in osteoclast activity (ref: Dubey doi.org/10.1038/s41593-025-02064-4/). Additionally, glioblastoma stem cells have been found to respond to inflammatory cues, promoting their self-renewal and reprogramming macrophages towards an immunosuppressive phenotype, highlighting a potential therapeutic vulnerability (ref: Chen doi.org/10.1016/j.devcel.2025.06.011/). Furthermore, the presence of tertiary lymphoid structures (TLSs) in a subset of gliomas has been associated with a remodeled perivascular space, indicating a complex interplay between tumor cells and the immune system (ref: Cakmak doi.org/10.1016/j.immuni.2025.09.018/). These findings underscore the importance of targeting the tumor microenvironment to enhance therapeutic efficacy and overcome immune evasion mechanisms. Moreover, the study by Zhang et al. reveals that cancer cells can exploit neuroimmune circuits to escape immune surveillance by secreting SLIT2, which activates nociceptive neurons and remodels tumor-draining lymph nodes into an immune-suppressed state (ref: Zhang doi.org/10.1016/j.cell.2025.09.029/). This suggests that the interaction between the nervous system and the immune response is pivotal in shaping the tumor microenvironment. The development of biodegradable implants to modulate myeloid cell activity represents a promising strategy to counteract the immunosuppressive effects of glioblastoma (ref: Kaiser doi.org/10.1038/s41551-025-01533-2/). Collectively, these studies highlight the intricate relationship between tumors and their microenvironments, emphasizing the need for innovative approaches to reprogram immune responses in cancer therapy.