 Dedicated images through the sella demonstrate a normal height of the pituitary gland. Pituitary stalk is slightly to the left of the midline without evidence of mass effect. Suprasellar cistern, optic chiasm, cavernous sinuses and intracranial portions of the optic nerves appear unremarkable.There is an area of hypoenhancement in the posterior aspect of the pituitary gland which measures up to 4 x 4 mm. Along the inferior aspect, there is a nonenhancing component possibly part of the same lesion which measures approximately 2 x 3 mm. Overall appearance of the pituitary gland is not changed since the prior exam, even dating back to 2/22/2014. There is no mass effect on the chiasm.Again seen is partially imaged periventricular white matter T2 signal abnormality related to known demyelinating disease and is better seen on prior brain MRI.
Subcentimeter area of hypoenhancement involving the posterior pituitary gland may represent microadenoma and remains unchanged since 2/22/2014. No evidence of macroadenoma or mass effect.