* 1.. Since suffering from 23 years, thus your attending Physician must have given due consideration in taking every necessary clinical examination and investigation to rule out other health conditions, thus the Doctor know the prognosis. [as there is long history, tumor is possibly benign] 2. since treatment is aimed at the cause of tumor, thus preventive aspect can be initiated from our side . fluid/salt restriction. . weight reduction if overweight. PS. make sure that vision is closely monitored, thus follow-up ophthalmologic examination [to note any change in vision] along with rise in pressure inside the brain and also Metastasis to other organs