A young woman with progressive headache and blurred vision

A 19 years old woman came to our clinic with chief complaints of progressive headache and blurred vision since 3 weeks ago. Headache was initially intermittent but gradually progressed and became constant and aggravated in the recumbent position. Furthermore, she had complaints of blurred vision and binocular diplopia especially in far distance. On neurologic examination, she had bilateral papilledema and bilateral sixth nerve palsies. The rest of examination was unremarkable. The brain CT scan is presented in figure 1. 1What abnormalities are seen on brain CT scan? 2What is the most probable diagnosis? 3What additional work-up do you request for this patient? 4What is the possible prognosis of this patient?