Thanks for the email. A CT scan is a good screening test for brain tumors but not as good as an MRI with and without contrast. The fact that nothing was seen in encouraging. You mentioned that you have had symptoms for the last 4 nights but you had testing done in October 06 and May 07 so something has been going on for longer that a few days. it seems doubtful that you have a brain tumor as the cause of your symptoms and should see a neurologist for further evaluation. GS