CD15, also known as LeX or SSEA-1, is a set of glycan moieties containing fucosylated N-acetyllactosamine, which is considered to be important for neural stem cell migration.29 In addition, the sialylated or sulfated forms of CD15 is closely associated with lymphocyte rolling, the first step for cellular extravasation, and cancer metastasis.31, 30. This evidence concerns the gene FUT4 and cancer.