Erosion Sellar Floor

Erosion of anterior and posterior clinoids can be seen pituitary tumors e g.

Erosion sellar floor.

Enlargement with erosion of anterior cortex of dorsum sellae proceeds to the floor of the sella and may result in complete destruction of the dorsum. Erosion or destruction of the sella turcica can arise with any of numerous intracranial tumors including. Gliomas of the optic nerve and hypothalamus may erode the clinoid processes. Chordoma of the clivus is frequently associated with erosion of the dorsum sellae and the sellar floor.

Mucocele of the sphenoid sinus. In the sellar type of sinus the thickness of the anterior sellar wall ranged from 0 1 to 0 7 mm mean 0 4 mm compared with 0 3 to 1 5 mm mean 0 7 mm for the presellar type. Focal erosion of the lateral margins secondary to an aneurysm focal erosions of the floor by pituitary lesions and selective erosion of the posteroinferior floor secondary to chronic increased intracranial pressure 3 4 are some of the more dependable findings. In patients with a known pituitary microadenoma erosion or remodelling of the pituitary floor is a sign of inferior extension.

Another measurement important in transsphenoidal surgery is the thickness of the anterior sellar wall and sellar floor. Erosion or remodelling of the pituitary floor is of limited help since it may be a normal finding.