Preoperative planning for pituitary cyst via transphenoidal surgery: right side visual defect. There is a cerebrospinal fluid signal intensity lesion within a mildly expanded sella turcica with extension into the suprasellar cistern, which 24 mm measures in height, 16 mm in width, and 16 mm front-to-back. There is marked mass effect upon the optic chiasm and adjacent portions of the bilateral optic nerves, which are stretched, but display normal signal characteristics. The pituitary gland is markedly stretched and mainly displaced anteriorly and superiorly along with the infundibulum. There is minimal mass effect upon the bilateral cavernous sinuses. The internal carotid artery flow voids are intact.
A sellar and suprasellar probable arachnoid cyst measures up to 24 mm and exerts marked mass effect upon the optic apparatus.