Using a microfluidic detection chip, magnetic nanoparticle labelling and NMR detection on circulating glioblastoma sEVs, Shao et al. identified a diagnostic signature comprising EGFR, EGFRvIII, PDPN and IDH1 R132H which displays a 90% combined accuracy in distinguishing tumour sEVs from control sEVs. The gene discussed is EGFR; the disease is neoplasm.