What is Tentorial meningioma?

Tentorial meningiomas are rare tumors located along the surface of the tentorium cerebella in the brain. These types of posterior fossa meningiomas can cause headaches, seizures, and difficulty walking.

What are the CT findings of meningioma?

On plain head CT scans, meningiomas are usually dural-based tumors that are isoattenuating to slightly hyperattenuating. They enhance homogeneously and intensely after the injection of iodinated contrast material. Perilesional edema may be extensive. Hyperostosis and intratumoral calcifications may be present.

Do meningiomas enhance on MRI?

Meningiomas typically manifest on magnetic resonance imaging (MRI) as iso- to hypointense on T1-weighted imaging and iso- to hyperintense on T2-weighted imaging. After contrast administration, they usually homogeneously enhance and exhibit a visible dural tail. Meningiomas with atypical findings may be misdiagnosed.

Where is the tentorial notch located?

The tentorial notch refers to the anterior opening between the free edge of the tentorium cerebelli and theclivus for the passage of the brainstem. It’s located between the tentorial edges and communicates the supratentorial and infratentorial spaces.

Where is the tentorium located in the brain?

The tentorium cerebelli, the second-largest dural reflection, is a crescent-shaped dura fold that extends over the posterior cranial fossa, separating the occipital and temporal cerebral hemisphere from the cerebellum and infratentorial brainstem [1,6].

What is the clinical significance of the tentorial notch?

The tentorial notch allows for the presence of a gap, which lodges the midbrain [1,6]. The midbrain inhabits the anterior portion of the incisura and the posterior half is occupied by the superior vermis or the splenium of the corpus collosum.

Which part of the brain occupies tentorial notch?

midbrain
The tentorial notch (also known as the tentorial incisure or incisura tentorii) refers to the anterior opening between the free edge of the cerebellar tentorium and the clivus for the passage of the brainstem. The midbrain continues with the thalamus of the diencephalon through the tentorial notch.

What is the function of tentorium?

The tentorium cerebelli functions as a partition, dispelling the burden of weight from supratentorial structures upon inferior brain matter.