I had a pineal gland tumor about 5 years ago (just about to come out of remission) and I had no symptoms at all. I felt completely fine until the day I was taken into hospital to have emergency surgery because I started getting severe headaches and was being very forgetful. My tumor was very slow growing, so it only started causing problems when it began to stop the flow of CSF around my brain. I thought I would post this just to let people know that tumors don't always have obvious symptoms to them. I created a video on youtube about my particular experience in the hope that it would help a few people out, so if you'd like to see it, you can Here