Transient cerebral arteriopathy is non-progressive and unilateral involvement of arteries especially supra clinoid
portion of internal carotid artery and its proximal branches11.
In the parasellar region, Anterior Clinoid
Process (ACP) with its supporting structures like Optic Strut (OS), medial part of lesser wing of the sphenoid and roof of the optic canal are certain bony landmarks related to important elements like the cavernous sinus, Internal Carotid Artery (ICA), Optic Nerve (ON) and the pituitary gland.
A family study of two skeletal variants: atlas bridging and clinoid
CT scan revealed linear un-displaced fracture of right frontal bone extending up to the roof and right ethmoid sinus, anterior clinoid
process and lateral pterygoid plate, fracture of medial and lateral wall of the right orbit, and fracture of right ramus of the mandible.
The lesion was causing thinning and pressure erosion of the posterior wall of maxillary sinus, pterygoid plate, posterior wall of orbit, medial wall of sphenoid on the left side, left lesser wing of sphenoid, and was causing thinning of left anterior clinoid
McDermott, "Mucocele involving the anterior clinoid
process: MR and CT findings," American Journal of Neuroradiology, vol.
Furthermore, V4 travels along the lateral and superior side walls of sphenoid sinus in a posterior-to-anterosuperior direction and exits medial to the anterior clinoid
process to become intradural segment [9,29].
Pneumatization of anterior clinoid
process was there in 2 (4%) patients; all unilateral.
A micro-grinding drill measured to be 8–10 cm long and 0.3 cm in distal diameter is more suitable for the removal of the anterior and posterior clinoid
processes, opening the back of the internal auditory canal and other deep bone removal operations through the keyhole approach.
The sella turcica in the sphenoid bone consists of a central hypophysial fossa and two pair of clinoid
processes (anterior and posterior).
For example, the signal void caused by a pneumatized anterior clinoid
process may mimic an internal carotid artery aneurysm due to juxtaposition with the supraclinoid internal carotid artery.
The remaining 3 aneurysms included one at the clinoid
segment of the right ICA, one at the bifurcation of the right MCA, and one at the bifurcation of the basilar artery and right superior cerebellar artery.