Primary tumor expression of NFκB. A-C: Phosphorylated p65 in primary medulloblastoma: immunohistochemical staining of three different primary medulloblastoma tumors with phos(S276)p65 antibody. Magnification: A = 10X; B = 20X; C = 10X. C shows endothelial cell positivity in addition to tumor cells. D: Expression of p65 and phos (S536) p65 in normal brain and tumor in humans [CX = cerebral cortex, CB1 and CB2 = cerebella from 2 different autopsy specimens; mb4, mb2, mb8 = surgical samples of 3 different patient medulloblastoma tumors] along with normal C57Bl/6 mouse cerebellum (CB) compared to Smo/Smo mouse (Smo) cerebellar tumor.