Immunohistochemical analysis of BCL7A, TRIM33, MTERF4, CTAG1A, DDX4 and MAGEC2 in LC and paracancerous tissues. A, C, E, G, I, K, BCL7A, TRIM33, MTERF4, CTAG1A, DDX4 and MAGEC2 in LC tissues, respectively B, D, F, H, J, L, BCL7A, TRIM33, MTERF4, CTAG1A, DDX4 and MAGEC2 in paracancerous tissues, respectively. M, the positive rate of the proteins in cancer and paracancerous tissues.