What is a tentorial meningioma?
Tentorial meningiomas are a broad and consistent category of tumors but their definition is still unclear and their classification uncertain. Since the tentorium has a large intracranial area, tumours originating from it may vary widely in the actual location of their mass.
Where does the tentorium receive its vascular supply?
The tentorium receives its vascular supply from the basal tentorial artery (artery of Bernasconi-Cassinari) arising from the meningohypophyseal trunk, the marginal tentorial artery originating from the inferolateral trunk of the intracavernous carotid, and tentorial branches stemming from the superior cerebellar and posterior cerebral arteries.
Is brainstem adhesion necessary for dissection of tentorial meningioma?
Rational judgment is required during unpredictable situations. Regarding brainstem adhesion, Samii believed that the surface of the tentorial meningioma is often covered with arachnoid, so there are multiple layers of membranes between the tumor and brainstem, which facilitates the safe dissection of the tumor (11).
What are the surgical approaches for posterior notch meningioma (TNM)?
The surgical approaches for posterior notch meningiomas are dominated by the suboccipital transtentorial approach (13), infratentorial supracerebellar approach (4), and subtemporal approach (1) (Figure 6). Open in a separate window Figure 5 Surgical approaches and outcomes of anterior and middle tentorial notch meningioma (TNM).