S100A9 and medulloblastoma: The most significant differences in CSF protein rank between medulloblastoma patients controls in the Bruschi cohort were Glial fibrillary acidic protein (GFAP), Histone H4 (HIST1H4A), Protein S100-A9 (S100A9) and, Fructose-biphosphate aldolase C (ALDOC).