i was recently diagnosed with a 9.6cm pineal cyst. it was 5cm 7yrs ago and has grown in that time. i have recently been experiencing severe headaches, fatigue, muscle weakness and dizziness. i have been seen by my family doctor who feels it's nothing to worry about, and my neurologist doesnt seem concerned either. but the headaches have gotten worse over the past few months,although i have no visual problems associated with it. how serious is this size cyst? is this something to be concerned with?