Female, 20 years old, with elevated prolactin and nipple discharge. A 2 mm focus of relative hypoenhancement is seen within the left aspect of the pituitary gland, best visualized on coronal image 10 series 7. Elsewhere, the pattern of pituitary glandular enhancement is homogeneous and within normal limits. The size of the gland is normal. The pituitary stalk enhances normally and sits at the midline. The posterior pituitary T1 hyperintense spot is well visualized and normal. No suprasellar abnormalities are detected. Limited views of the remainder of the brain are within normal limits.
A 2 mm focus of relative hypoenhancement is seen within the left aspect of the pituitary gland. This could potentially represent a microadenoma, though a small cyst or an area of prior parenchymal injury could appear similarly.