Extracellular vesicles (EVs) play a pivotal role in cancer biology, particularly in the context of tumor progression and metastasis. One study highlights how tumor-derived arachidonic acid reprograms neutrophils, promoting immune suppression and therapy resistance in triple-negative breast cancer (TNBC). This research indicates that TNBC cells surviving anti-PD-1 and chemotherapy treatments accumulate neutral lipids, suggesting a mechanism of acquired resistance (ref: Yu doi.org/10.1016/j.immuni.2025.03.002/). Another significant finding is the role of small extracellular vesicles (sEVs) derived from tumor-free pre-metastatic organs, which were shown to promote breast cancer metastasis and support organotropism, indicating that even non-tumor tissues can influence cancer progression (ref: Cheytan doi.org/10.1186/s12943-025-02235-8/). Additionally, a multi-phase study identified blood-derived exosomal tumor RNA signatures as non-invasive diagnostic biomarkers for multiple cancers, emphasizing the potential of EVs in early cancer detection (ref: Wang doi.org/10.1186/s12943-025-02271-4/). These findings collectively underscore the complex interplay between EVs and cancer biology, revealing both diagnostic and therapeutic implications. The methodology employed across these studies varies, with some utilizing RNA sequencing and single-cell data integration to identify biomarkers, while others focus on the functional roles of sEVs in immune modulation and tumor microenvironment interactions. For instance, the study on limb ischemic conditioning demonstrated that muscle-to-liver transfer of sEVs and their microRNA cargo could alleviate steatohepatitis, showcasing how EVs can mediate beneficial effects beyond cancer (ref: Zhao doi.org/10.1016/j.cmet.2025.02.009/). Furthermore, the programmable production of bioactive EVs via a bioelectronic interface presents a novel approach to localized treatment of myocardial infarction, indicating the versatility of EV applications in regenerative medicine as well (ref: Fu doi.org/10.1038/s41467-025-58260-0/).