MRI
A midline cystic lesion, measuring 16x9x8 mm, is seen involving the pituitary gland. An intracystic tiny nodule involves the left anterior inferior aspect of the cyst. Posterior to this nodule, there is a septation involving the left aspect of the cyst. There is peripheral enhancement of the cyst which could be related to the compressed pituitary tissue. The lesion causes upward convexity of the pituitary, however, there is no mass effect on the optic chiasm. There is no extension into the adjacent cavernous sinuses. No fluid-fluid level could be detected within the cyst.