Results of Mri

My son had a MRI back in May and his results are as follows:

The hippocampus on the left is slightly bulkier than that of the right. There appears to be also slight increased signal within this structure. No contrast was administered for the purpose of the procedure/study. The abnormality may relate to recent seizure activity, however a follow up scan with and without contrast media is suggested in 3 mths time to exclude a progessive lesion
No further abnormality is demonstrated within the brain, the ventricles are normal size, flow in the major intracranial vessels also appears normal, no extra-axial collections.
A retention cyst is seen within the posterior ethmoid/sphenoid complex on the right.

My son who is 10 was diagnosed epileptic 2 years ago afte having several tonic clonic seizures. He is currently on epilim and lamictal.
In Feb of this year he had a mild TIA which he developed left side weakness, unequal pupils and his ECG showed atrial extra systoles.

Is there anything I should know or is this just a mystery, my sons Neurologist wants to wait 6 mths before redoing MRI but I am not sure if this is the right thing to do.

I have posted comments on here before (May) and any help would be greatly appreciated.

[miamiamia]

My son (6 year old) has something called and Arachnoid Cyst in his posterior fossa.  There was something different about his hippocampus as well - I would have to look at his MRI to tell you.  He also has seizures being treated with valproic acid (for 1 Year now) which took care of his absence seizures, but not to the Dr.'s satisfaction on the I think they are called focal seizures (half hiccup).  They were greatly reduced (used to have all day) and now are rare.  It is time to try another medicine ):   I just had to respond seeing similarities.

Mom's experience

[vega1318]

It's not unreasonable of the neurologist to wait some time before performing another test.   In the meantime, did he have an EEG?   Some seizures are commonly arising from an abnormally structured hippocampus -- if they're difficult to control with medications, patients sometimes require surgery, but it is the very last resort.   You should consult with an experienced epileptologist before going that route.   Unusual for a 10 year old to have TIAs -- could they have been seizures as well?