One study, during proteomic analysis, found exosome having proteins like VEGF, MCP-1, IL-4, and EGF—they aid tumour cells survival, growth, and transit—those exosomes with TGF-β stimulated division of fibroblasts into myofibroblasts, supporting tumour proliferation, vascularisation, and metastasis. Here, IL4 is linked to neoplasm.