I have a grade one glioma. what exactly does that mean?

Better prognosis.: A glioma is a CNS tumor composed of glial cells. The types of gliomas are astrocytoma, ependymoma, oligodendroglioma and mixede type. They originate most commonly in the brain. A low grade glioma is a well differentiated tumor that, while not benign, carries a better prognosis with an age-standardized 10 year relative survival rate of 47%.

Long term control: A grade i glioma is low grade. They are more common in the pediatric population. They tend to be indolent and very slow growing. The pilocytic variant has a very good prognosis. Surgical removal can be curative. There have been recent genetic studies of these and other tumors that have suggested that these may mutate and evolve over time changing to grade 2 then 3 then 4.