The common supratentorial tumors in adults are glioma (36%), meningioma (32.1%), and adenoma pituitary (8.4%). Approximately half of these tumors are malignant. The majority of them (> 80%) are supratentorial. For the entire primary tumor, the average age when a brain tumor was detected is 57 years old. The exact number of metastatic brain tumor incidence is unknown, but it is assumed quite lo…