Research on cancer and extracellular vesicles (EVs) has revealed critical insights into their roles in tumor progression and immune evasion. Tumor-derived exosomes (T-EXOs) have been shown to hinder the efficacy of immune checkpoint blockade therapies, prompting the development of innovative strategies to inhibit their function. For instance, a curvature-sensing peptide was engineered to disrupt T-EXOs from various cancer types, enhancing the effectiveness of cancer immunotherapy (ref: Shin doi.org/10.1038/s41563-023-01515-2/). Additionally, colorectal cancer-derived EVs were found to induce an immunosuppressive niche in the liver, facilitating early liver metastasis through the enrichment of Tgf-β1, which was confirmed using CRISPR-Cas9 techniques (ref: Yang doi.org/10.1038/s41392-023-01384-w/). These findings underscore the multifaceted roles of EVs in cancer biology, particularly in metastasis and immune modulation. Moreover, the isolation and analysis of T-EVs are paramount for clinical applications, as demonstrated by the development of a fluid multivalent magnetic interface that significantly enhances the isolation efficiency of T-EVs (ref: Niu doi.org/10.1002/anie.202215337/). This method improves the yield of protein profiling, which is crucial for understanding the molecular landscape of tumors. In hepatocellular carcinoma, exosomal circCCAR1 was identified as a key player in CD8+ T-cell dysfunction and resistance to anti-PD1 therapy, highlighting the importance of EVs in shaping the immune response against tumors (ref: Hu doi.org/10.1186/s12943-023-01759-1/). Collectively, these studies illustrate the complex interplay between EVs and cancer, revealing potential therapeutic targets and diagnostic biomarkers.