CEACAM5 and colorectal carcinoma: In the current study, Con-A demonstrated binding to C19.9 and CEA CRC samples; CA19.9Con-A detected 11 out of 22 CRC samples, whereas CEACon-A detected 6 out of 22 CRC samples, but interestingly the two negative early-stage samples with CD151CD63 were found positive with these glycovariant assays.