papilledema

I have an appt for my almost 3yo for an eye exam after a Brain MRI (done for night/nap gagging &vomiting).  The MRI showed a pineal cystic lesion measuring 13.5mm x 7.4mm is long and short axis in the sagittal plane & approx 8.2 mm transversely. No sig compression of tectum.  Aqueduct of sylvius patent. CSF space normal. It also showed a small amount of fluid in the perineuronal sheets of the optic nerve.  Moderately prominent tonsils and adenoids (adenoids). The suggestion of the eye exam is to evaluate for papilledema.  Repeat MRI in 3 mos.  What does the fluid in the sheets of the optic nerve mean?  If there is papilledema what does that represent and what is the prognosis?  Thanks!

[Forum-OD-MP]

this is not ophthalmology.  this is neurology.

papilledema is 'swelling' of the optic nerve.  it usually causes some pretty nasty vision loss...sometimes temporary, sometimes permanent.  its not really an 'eye' problem...its a neurological one.  it just happens to be obvious to someone who knows how to look at an optic nerve.

the prognosis is difficult to predict.  papilledema is really a sign of a larger problem (tumor!)

[aimee37]

fluid in the perineuronal sheets of the optic nerve and papilloedema are signs of increased intracranial pressure. And increased intracranial pressure may be the sign of many different process in brain