Temporal Bone Meningiomas

Abstract

Temporal bone (TB) meningiomas are rare lesions that may be classified into two distinct groups: lesions originating in the TB and lesions originating outside the TB and invading the bone during their growth.1 Primary meningiomas of the TB have been rarely reported, and from a histopathologic point of view this term should be reserved to lesions truly originating from the TB. However, the real existence of this entity is presently questioned after a literature review by Chang et al.,1 who found that no ``primary meningioma'' reported in the literature had been evaluated with magnetic resonance imaging (MRI); this makes it impossible to completely exclude the possibility of a far more frequent intra-cranial meningioma with secondary temporal bone invasion.