Which is the most malignant variety of astrocytoma, the most frequently occurring tumor, exclusive to the cerebrum, with rapid growth and spread?

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Multiple Choice

Which is the most malignant variety of astrocytoma, the most frequently occurring tumor, exclusive to the cerebrum, with rapid growth and spread?

Glioblastoma multiforme is the highest-grade astrocytoma (WHO grade IV) and the most malignant form. It typically arises in the cerebral hemispheres, grows very rapidly, and invades surrounding brain tissue with a highly infiltrative pattern, which explains its aggressive course and poor prognosis. This combination of high grade, rapid growth, and cerebrum-centered origin is what makes it the correct choice. The other options describe different tumors: a general astrocytoma can be lower-grade and slower-growing; meningioma arises from the meninges rather than astrocytic tissue; oligodendroglioma is a glial tumor that often grows more slowly and has different clinical behavior.

Glioblastoma multiforme is the highest-grade astrocytoma (WHO grade IV) and the most malignant form. It typically arises in the cerebral hemispheres, grows very rapidly, and invades surrounding brain tissue with a highly infiltrative pattern, which explains its aggressive course and poor prognosis. This combination of high grade, rapid growth, and cerebrum-centered origin is what makes it the correct choice. The other options describe different tumors: a general astrocytoma can be lower-grade and slower-growing; meningioma arises from the meninges rather than astrocytic tissue; oligodendroglioma is a glial tumor that often grows more slowly and has different clinical behavior.

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