Eighteen proteins (BAIP2, CPNE1, FIBA, CO5, CD91/LRP1, MASP1, APOB, CO8A, PLMN, PGBM, PERM, FCGBP, ITA2B, KV313, IC1, A2MG, CD317/BST2, and HABP2) have been identified in exosomes from the serum samples of lung cancer patients, including adenocarcinoma (AC) and squamous cell carcinoma (SCC) [114]. Here, BST2 is linked to lung cancer.