IVIg contained antibodies to blood group antigens H, A and B. Notably absent, however, were antibodies to selectin ligands, Siglec ligands and cancer-associated glycans, such as sialyl Lewis x (sLex), sialyl Lewis a (sLea), 6(Gal)-su-sLex, 6(GlcNAc)-su-sLex, polysialic acid (PSA), sialyl Tn (sTn), Lewis y (Ley) polysialic acid (PSA) and the gangliosides GD2, GD3, fucosyl GM1 and GM2.