I had a brain tumor, not a colloid cyst. The tumor was located in one of my lateral ventricles, though. Basically, the center of my brain. The symptons I experienced were seizures, headaches, double vision, personally changes plus a few other things. Sounds like our symptons are/were similiar. Ended up having surgery in 1992. The tumor was benign, thank goodness! Was seizure free until 2014. Been having a grand mal seizure about every 2 years since. Any doctor I've been too have no clue as to why the seizures started up, again. Very fustrating! In November, it will be 29 years since my surgery. Feels like it was yesterday.