Recent studies have significantly advanced our understanding of tumor biology, particularly in the context of brain tumors and their underlying mechanisms. One notable study identified CD19 expression in brain mural cells, suggesting potential off-tumor targets for CAR-T immunotherapies, which are effective in treating B cell malignancies but often lead to neurotoxicity (ref: Parker doi.org/10.1016/j.cell.2020.08.022/). Another investigation revealed that oxidative metabolism plays a crucial role in the immortalization of neural stem cells during tumorigenesis, with findings indicating that mitochondrial fusion can be a rate-limiting factor for tumor-initiating cells (TICs) (ref: Bonnay doi.org/10.1016/j.cell.2020.07.039/). Furthermore, a study on meningiomas highlighted the importance of intratumor heterogeneity, revealing that multiplatform genomic profiling can elucidate biological drivers and identify new therapeutic targets (ref: Magill doi.org/10.1038/s41467-020-18582-7/). These findings collectively underscore the complexity of tumor biology, emphasizing the need for targeted approaches in treatment strategies. In addition to these insights, research has also focused on genetic factors influencing tumor behavior. A study on cerebral palsy linked mutations in neuritogenesis genes to increased risk, highlighting the role of genetic predispositions in tumor development (ref: Jin doi.org/10.1038/s41588-020-0695-1/). Moreover, the impact of tumor genotype on radiosensitization was examined, revealing that genetic deletion of Atm improved survival in specific glioma models, indicating that tumor genetics can dictate responses to therapies (ref: Deland doi.org/10.1172/JCI142158/). Together, these studies illustrate the intricate interplay between genetic factors and tumor biology, paving the way for more personalized treatment approaches.