<unk>  has been classified into 3 groups by the WHO: benign classic<unk>  (WHO grade 1), atypical<unk>  (WHO grade 2), and anaplastic malignant<unk>  (WHO grade 3). The WHO grade 1 group grow very slowly and consists of about 9 variants. About 3 variants correspond to WHO grade II, their association with malignancy is not clear but they grow faster than benign<unk> s. About 2 variants correspond to WHO grade III.
Meningioma classification
Glioma classification
Medulloblastoma classification
Oligoastrocytoma classification
Myxoma classification
Lymphangioma classification
Glioblastoma multiforme classification
Acoustic neuroma classification