Classification

Classification

WHO classifies primary brain tumours on the basis of cell of origin and histological grade ( Figure 48.20 ), with the 2016 edition including a number of additional molecular classifica tions assigned in parallel to constitute an ‘integrated’ diagnosis. Common adult primary brain tumours include gliomas, meningiomas (15–20% of total), pituitary adenomas (10–15% of total) and vestibular schwannomas. Grade I is applied to ‘benign’ lesions, while grade IV implies high-grade malignancy . Classification

WHO classifies primary brain tumours on the basis of cell of origin and histological grade ( Figure 48.20 ), with the 2016 edition including a number of additional molecular classifica tions assigned in parallel to constitute an ‘integrated’ diagnosis. Common adult primary brain tumours include gliomas, meningiomas (15–20% of total), pituitary adenomas (10–15% of total) and vestibular schwannomas. Grade I is applied to ‘benign’ lesions, while grade IV implies high-grade malignancy . Classification

WHO classifies primary brain tumours on the basis of cell of origin and histological grade ( Figure 48.20 ), with the 2016 edition including a number of additional molecular classifica tions assigned in parallel to constitute an ‘integrated’ diagnosis. Common adult primary brain tumours include gliomas, meningiomas (15–20% of total), pituitary adenomas (10–15% of total) and vestibular schwannomas. Grade I is applied to ‘benign’ lesions, while grade IV implies high-grade malignancy .