PTA Physical Therapy Assistant

Answer: A - Astrocytoma is the most common primary brain tumor.

Astrocytoma arises within the brain structure. Frontal, temporal, parietal and thalamic regions are the primary sites.

Oligodendroglioma are slow growing, sharply defined tumors and usually involve the frontal lobe. This is less common than astrocytoma.

1/5^th of all primary intracranial tumors are usually Meningioma arising from the arachnoid granulation. These are slow-growing in nature.

Ependymoma occurs anywhere throughout ventricular system and spinal canal. They are most common in the fourth ventricle and cauda equina.