Glad that your son is better (no more head tilt or breath-holding). Unfortunately, I'm not quite sure where the cyst
is by your report or what kind of cyst
it is (very important to know exactly where it is in relation to the brain - in/outside, over the covering?, etc). Many times, when we do an MRI of the brain we see what's called incidental findings. This means there is something in or around the brain that really does not have any clinical significance such as an arachnoid cyst.