Hyperprolactinemia with 3mm adenoma years ago: elevated prolactin. There is a 4 mm wide apparently hypoenhancing focus in the posterior adenohypophysis. The rest of the pituitary gland, including the posterior pituitary bright spot are unremarkable. The infundibulum is intact and situated in the midline. The cavernous sinuses and optic apparatus are unremarkable.
A 4 mm lesion in the pituitary gland may represent a microadenoma.