From 45-84 years old, the most common forms of brain/CNS tumors (respectively) are:

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Multiple Choice

From 45-84 years old, the most common forms of brain/CNS tumors (respectively) are:

Explanation:
In adults in this age range, the most common brain tumor is meningioma, a typically benign tumor arising from the meninges (arachnoid cap cells) along the brain surface. Meningiomas grow slowly and often present with seizures or focal neurologic symptoms depending on their location. For the broader category of CNS tumors, the most common malignant primary CNS tumor in adults is glioblastoma multiforme, an aggressive astrocytic tumor that invades surrounding brain tissue, frequently presenting with rapidly progressive focal deficits, headaches, or cognitive changes. The distinction matters because many other tumors on the list are more typical of children (medulloblastoma, pilocytic astrocytoma) or are common but not the top lesion in this age group (pituitary adenomas). Thus, meningioma best fits as the common brain tumor and glioblastoma as the common malignant CNS tumor in adults 45–84.

In adults in this age range, the most common brain tumor is meningioma, a typically benign tumor arising from the meninges (arachnoid cap cells) along the brain surface. Meningiomas grow slowly and often present with seizures or focal neurologic symptoms depending on their location. For the broader category of CNS tumors, the most common malignant primary CNS tumor in adults is glioblastoma multiforme, an aggressive astrocytic tumor that invades surrounding brain tissue, frequently presenting with rapidly progressive focal deficits, headaches, or cognitive changes. The distinction matters because many other tumors on the list are more typical of children (medulloblastoma, pilocytic astrocytoma) or are common but not the top lesion in this age group (pituitary adenomas). Thus, meningioma best fits as the common brain tumor and glioblastoma as the common malignant CNS tumor in adults 45–84.

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