Double vision as a symptom of brain tumor is suggestive for tumors located in the brain steam or middle part of the brain.
These tumors are known as brain steam gliomas.
Although, the double vision can be the most common presenting symptom of these type of tumors, still patients can have other complains like weakness of one side of the body and face, inability to close the eyelids properly, difficulties with walking, speaking, swallowing.
Brain steam gliomas occur almost exclusively in children, and symptoms are often present for 6 months or less at time of diagnosis.
Most brain stem tumors cannot be surgically removed because of the remote location and delicate and complex function this area controls.
Radiotherapy is the main treatment with use of some chemotherapeutic agents in certain cases.
Typical brain steam gliomas are very progressive and refractive (nonresponding to the applied treatment), often with poor prognosis.
Atypical brain steam gliomas can carry an exceptional prognosis, with long-term survivals frequently reported.