"Meningiomas are tumors that originate from the arachnoidal cap cells of the leptomeninges. With an incidence rate of 8.36 per 100, 000 population, they are the most common primary central nervous system (CNS) tumors, accounting for a third of all cases. The World Health Organization (WHO) classification has traditionally categorized meningiomas into 15 different histopathological subtypes and three clinical grades. Tumors are classified as WHO grades 1, 2 or 3 based largely on histopathological features such as mitotic activity, presence of brain invasion, and other atypical features....