Cerebellar falx is an extremely rare location for cavernous hemangiomas, also known as cavernomas. Although cavernomas can occur anywhere in the body, the commonest CNS site is subcortical white matter. Extra-axial cavernomas are very rare, and even less common in the posterior cranial fossa (about 15 reports up to 2018). Among these 15, only 2-3 were reported involving the cerebellar falx, and the rest arose from the tentorium.

As such, this present case is among the very unique.