discussion-presentation19

• It occurs  approximately 1 to3 percent of all brain tumors.
•  There is a bimodal age distribution, with one peak in children between 5 and 14 years, and a second peak in adults between 50 and 75 years of age.
•  Visual symptoms – Visual symptoms are frequent, and are present in the majority of patients. These can be a direct result of pressure on the optic chiasm;