The clinical utility of PD‐L1+ exosomes captured using our avidity‐based platform (G7‐pPDL1 surface) was evaluated using serum samples obtained from 7 healthy donors, 30 hepatocellular carcinoma (HCC) patients, and 15 lung cancer patients (Tables S1 and S2, Supporting Information). This evidence concerns the gene CD274 and hepatocellular carcinoma.