CFB and primary central nervous system lymphoma: Although few clinical specimens were used, the CNS lymphoma tissue-specific oligosaccharides, including GM9, BA-2, A2G0F, BA-1, LewisXa/b-BA-2, Ga/b-BA-2, A2G2, A3G3, and A2G1 (3)(6)F, were isolated, whereas there could have been contaminating blood cells and/or macrophages from the tumor microenvironments.