Last Updated: September 30, 2018
Meningiomas originating from the tentorium cerebelli account for about 3% to 6% of all intracranial meningiomas and about 30% of the meningiomas found in the posterior fossa. Like other meningiomas, these tumors are most common among middle-aged women.
They can originate anywhere on the tentorium, with about half occurring laterally along the transverse sinus, one-quarter along the medial or free edge of the tentorium, and the remaining one-quarter split primarily between tumors of the central portion of the tentorium and those involving both the tentorium and the falx. A very small proportion of these tumors are peritorcular, encompassing the torcula herophili.
Tentorial meningiomas have been c...