Why do MRI of a pituitary gland?

[ssimagic]

I was scheduled and got a MRI with contrast done on my pituitary gland at our local VA hospital.  I have no idea why one would be done and am wondering what would make them need to do an MRI.  Unfortunately, at the VA, we do not have as much access to the doctors because their work load is so high.  The nurses I have spoke to just said I would  have to ask on my next appointment 3 months from now.  Why is a MRI done on pituitary glands? What could they be looking for and what would cause them to order the MRI?  I am generally in good health and my last complaint is a rash that appears to be an allergy but we have not been able to find its cause yet. No serious health issues otherwise. Nothing other than high blood pressure controlled by medication.  Thank you,

[rumpled]

Pituitary disorders can range from subtle to horrible but not usually a rash on its own. High blood pressure is a sign but usually not able to be controlled by meds. So without much to go on, as a pituitary patient myself I can't guess. There are many disorders related  so could be many things?