 There is a 9 x 9 mm nonenhancing lesion in the midline sella which is T1 hyperintense to brain and very T2 hyperintense, nearly matching CSF signal. The lesion abuts the infundibulum and appears to displace the pituitary gland along the floor of the sella. This lesion appears to be stable in size when compared to prior studies dating back to 2007. The lesion projects up into the suprasellar space and approaches the optic structures, but does not impinge on them. There is patchy and confluent periventricular white matter T2 hyperintensity which is consistent with previously demonstrated small vessel ischemic disease.
T1/T2 hyperintense, non-enhancing lesion within the sella which displaces the pituitary gland; the appearance raises the question of a proteinaceous cyst or, perhaps less likely, a non-enhancing adenoma. The lesion has been stable in size dating back to studies from 2007.