What is clinoid meningioma?
Clinoidal meningiomas (CM) are benign tumors arising from the meningeal covering of the anterior clinoid process (ACP). These tumors have been referred to by various other terms, such as medial or inner sphenoid wing meningiomas.
What is the anterior clinoid?
The anterior clinoid process (ACP) is a bony structure on the superolateral aspect of the sphenoid sinus lying between the internal carotid artery and the optic nerve. Blockage of the drainage of a paranasal sinus for any reason can result in accumulation of trapped secretions and result in a mucocele.
What is clinoid process?
The posterior border of small wing of sphenoid, smooth and rounded, is received into the lateral fissure of the brain; the medial end of this border forms the anterior clinoid process, which gives attachment to the tentorium cerebelli; it is sometimes joined to the middle clinoid process by a spicule of bone, and when …
Where is the Clinoid located?
The anterior, middle and the posterior clinoid processes are located in the middle cranial fossa of the skull. The posterior boundary of the pituitary fossa is formed by the dorsum sellae, the supero-lateral angles of which are raised to form the posterior clinoid process.
What does Clinoid mean?
(klī′noyd) [Gr. kline, bed, + eidos, form, shape] Shaped like a bed.
Where is the anterior Clinoid process located?
Background: The anterior clinoid process (ACP) is located close to the optic nerve, internal carotid artery, ophthalmic artery, and can be easily injured in an ACP-related surgery.
What is Pneumatization of the anterior Clinoid process?
Pneumatized anterior clinoid process (ACP) is a common incidental finding seen on cross-sectional imaging and intraoperatively. The sphenoid sinus varies in the extent of aeration along the sphenoid bone. Pneumatization begins in childhood and ends in adolescence.
What problems can a meningioma cause?
Balance or walking difficulty – Meningiomas in a specific region of the brain can cause difficulty with balance or cause problems with coordination such as clumsiness. Headaches, nausea, and vomiting – As a meningioma grows, its increasing size can increase the pressure inside the skull.
Is it possible to remove the anterior clinoidal meningiomas?
Objective: Surgical removal of anterior clinoidal meningiomas (ACMs) remains a challenge because of its complicated relationship with surrounding meninges, major arteries and cranial nerves. This study aims to define the meningeal structures around the anterior clinoid process (ACP) and its surgical implications.
What are the symptoms of meningioma in the legs?
Depending on the meningioma’s size and location, common symptoms may include: Headaches Seizures Blurred vision Weakness in your arms or legs Numbness
Where does clinoidal meningiomas affect the optic nerve?
Clinoidal meningiomas are centered on the anterior clinoid process and grow upward with a small pedicle while causing hyperostosis of the anterior clinoid process itself. The optic nerve is frequently compressed and visual symptoms occur early and in most cases.
When to see a doctor for meningioma symptoms?
Most signs and symptoms of a meningioma evolve slowly, but sometimes a meningioma requires emergency care. Make an appointment to see your doctor if you have persistent signs and symptoms that concern you, such as headaches that worsen over time.