<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing severe headaches and blurred vision. My family history suggests that my grandfather had brain cancer. What do you think is causing my symptoms?  <response>: Based on your symptoms and family history, I suspect you may have brain cancer. To confirm the diagnosis, we will need to run a series of tests. These include a hematologic test to analyze your blood, a complete blood count to check for abnormalities, radiographic imaging procedures such as MRI and CT scans, a glucose measurement to evaluate your blood sugar levels, and an electrolytes panel to assess your bodys balance of minerals and vitamins. 