Seizure Possibly Caused by Cyst?

While driving a couple of weeks ago I had a seizure. It began with flashing/moving colored lights and shapes. This wasn't the first time I've experienced this. Ive always been able to sit down and rest until it went away. This time I woke up in an ambulance after a few grand mal seizures. Apparently the flashing lights have been partial seizures. I was given a head ct and an MRI and a (golf ball sized) 5cm cystic lesion was found in my parieto occipital lobe. I'm on keppra. I've seen a neurologist and now He has referred me to a neurosurgeon. What can I expect from here? Do I have epilepsy? Is the cyst causing the seizures? Surgery? I can't seem to get any concrete answers from the doctors I have talked to except that I can't drive for 6 months.