Erosion Sellar Floor

Thickening of the tuberculum or of the clinoid processes and blistering of the planum sphenoidale have frequently been reported in association with meningiomas of the sella turcica. Gliomas of the optic nerve and hypothalamus may erode the clinoid processes. In patients with a known pituitary microadenoma erosion or remodelling of the pituitary floor is a sign of inferior extension.

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Primary or secondary neoplasms including.

Erosion sellar floor.

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. Erosion or destruction of the sella turcica can arise with any of numerous intracranial tumors including. 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. Another measurement important in transsphenoidal surgery is the thickness of the anterior sellar wall and sellar floor.

Erosion of anterior and posterior clinoids can be seen pituitary tumors e g. Furthermore osteolysis of the dorsum sellae and clinoids sometimes occur in childhood leukemia and langerhans cell histiocyto. Erosion or remodelling of the pituitary floor is of limited help since it may be a normal finding. Mucocele of the sphenoid sinus.

Chordoma of the clivus is frequently associated with erosion of the dorsum sellae and the sellar floor. 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.

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