Extracellular vesicles (EVs), particularly small extracellular vesicles (sEVs), have emerged as critical players in cancer biology, influencing tumor progression and metastasis. One study introduced SEVtras, an algorithm that utilizes droplet-based single-cell RNA sequencing to identify sEV-containing droplets and estimate the sEV secretion activity (ESAI) of individual cells, highlighting the heterogeneity of sEVs and their role in cellular communication (ref: He doi.org/10.1038/s41592-023-02117-1/). Another study demonstrated that targeting sEV trafficking in breast cancer cells can normalize TGF-β signaling, thereby reducing metastasis and cancer aggressiveness (ref: Teixeira doi.org/10.1038/s41392-023-01711-1/). Furthermore, a liquid biopsy signature of circulating EV-derived RNAs was developed to predict chemotherapy responses in metastatic colorectal cancer patients, showcasing the potential of EVs as non-invasive biomarkers (ref: Yang doi.org/10.1186/s12943-023-01875-y/). The involvement of EVs in liver cancer was also explored, where significant circular RNAs in liver cancer stem cell exosomes were identified as mediators of malignant propagation, emphasizing the need for further research into their mechanisms (ref: Han doi.org/10.1186/s12943-023-01891-y/). Additionally, nasopharyngeal carcinoma-derived EVs were shown to induce regulatory dendritic cells, suggesting a role in immune modulation (ref: Lefebvre doi.org/10.1002/jev2.12390/). Overall, these studies underscore the multifaceted roles of EVs in cancer biology, from influencing tumor microenvironments to serving as potential biomarkers for treatment responses.