Classification of Brain Tumors

In the majority of laboratories throughout the world the classification of Bailey and Cushing (1926, 1930) has been formerly used with some modifications. In English-speaking countries Kernohan’s classification, based on a system of “grading” (Kernohan et al. 1949), was most often employed and in the Portuguese- and Spanish-speaking world Del Rio Hortega’s (1945, 1962) system of classification was preferred.