Expression of R-RAS2 protein in tissue from highly malignant human CNS tumors. Samples were obtained from the commercial Brain Medulloblastoma tissue microarray (CC17-01-002). Cryostat sections of human brain tumor tissue from medulloblastomas, cerebromas, meningiomas, ependymomas and undifferentiated tumor tissue were immunostained with an antiserum against R-RAS2, and counterstained with hematoxylin and eosin. R-RAS2 expression is represented as the diaminobenzidine absorbance in the samples, and R-RAS2 expression in each brain tumor subtypes was quantified and normalized to the expression in control samples Student’s t-test *p < 0.05, **p < 0.00005. ANOVA p < 0.00001. Scale bars = 50 μm.