A well-defined heterogeneously enhancing space-occupying mass lesion in the suprasellar/sellar region, most likely represents craniopharyngioma. 

The possibility of this representing a pituitary macroadenoma or other lesions seems unlikely. 

Editors note: Unfortunately additional diagnostic information is not available and it is uncertain whether this represents an adamantinomatous craniopharyngioma or papillary craniopharyngioma. Given baseline frequency and the dominant cystic component with intermediate-high T1 signal this most likely represents an adamantinomatous craniopharyngioma. 

For the purposes of this case, it has been given the diagnosis of craniopharyngioma not otherwise specified (NOS).