A patient presents with seizures. An MRI reveals a meningioma most likely originating from the:
a. dura mater and arachnoid membrane.
b. astrocytes.
c. pia mater.
d. CNS neurons.
ANS: A
Meningioma tumors usually originate from the arachnoidal (meningeal) cap cells in the dura ma-ter. Astrocytes are found in the brain but are not related to meningiomas. The pia mater is the lo-cation of the infection meningitis. Neurons are located throughout all regions of the brain.
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