Enlarged Sella with hx of PsuedoTumor Cerebri

I am a 36 year old female. Moderately obese with a history of good blood pressure and Polycystic Ovarian Disease.  Around the age of 22, I was diagnosed with psuedotumor cerebri.  After three years of treatment with prednisone and Diamox (and two lumbar punctures), my symptoms went away and annual check ups with my Opthalmologist have proven that no additional damage has been done to my optic nerves.

Approximately 11 months ago, I was diagnosed with mild sub-clinical hypothyroidism and am not on daily does of Synthyroid.  

Approximately 5 months ago, I complained of extreme neck pain near my left lymph gland.  An ENT physician confirmed with a neck CT that I had a condition called "Carotidynia" which is in the migrane (migraine) family.

Last week, I had a pinched nerve in my back.  My PCP ordered a neck x-ray and I was told that the Radiologist found a moderately enlarged sella turcica.

Question 1:  With my history, is it more likely that this is empty sella? Is it possible that was was found was old damage from over 10 years ago since I have been symptom free?

Question 2:  Given that I had a neck CT just five months ago, if the Sella Turcica was abnormal, wouldn't it have been seen in the CT?  

My physician has sceduled an MRI for me and I proactively scheduled an appointment with my opthalmologist.  I truly do not feel that the psuedotumor cerebri has returned.

Thank you ever so much for your time.

[Nashville71]

Correction:  Sorry about the typo - I AM on daily doses of Synthyroid.

[snoopyed]

Can an enlarged sella be caused by a head but to the orbital bone?