title: Intralabyrinthine meningioma.
abstract: An 18-year-old female patient with unilateral hearing loss underwent evaluation with CT and MR imaging. A partially ossified, enhancing lesion in the bony labyrinth, with replacement of adjacent structures, was identified. Surgical biopsy revealed a meningioma arising primarily within the bony labyrinth. To our knowledge, this entity has not been previously described.
mesh_terms: D001706:Biopsy; D003051:Cochlea / Q000473:pathology; D003937:Diagnosis, Differential; D004428:Ear Neoplasms / Q000175:diagnosis* / Q000473:pathology; D007758:Ear, Inner / Q000473:pathology; D005260:Female; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D007759:Labyrinth Diseases / Q000175:diagnosis* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008579:Meningioma / Q000175:diagnosis* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014722:Vestibule, Labyrinth / Q000473:pathology