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A, Coronal unenhanced CT scan reveals typical thickening and trabecular hyperostosis of the tegmen tympani (black star). A, Coronal unenhanced CT scan.

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Presentation on theme: "A, Coronal unenhanced CT scan reveals typical thickening and trabecular hyperostosis of the tegmen tympani (black star). A, Coronal unenhanced CT scan."— Presentation transcript:

1 A, Coronal unenhanced CT scan reveals typical thickening and trabecular hyperostosis of the tegmen tympani (black star). A, Coronal unenhanced CT scan reveals typical thickening and trabecular hyperostosis of the tegmen tympani (black star). Note the soft-tissue mass in the middle ear cavity (white star), which encases the ossicles but lacks erosive or destructive change.B, Axial unenhanced CT scan shows ossicular encasement without erosive or destructive changes (black arrow). The involved calvaria (white arrows) is characterized by preserved internal architecture (trabecular hyperostosis) and irregularity of the inner table.C, Coronal contrast-enhanced MR image shows typical en plaque enhancement along the floor of the middle cranial fossa (straight white arrows) in a tegmen tympani meningioma. Note thickened enhancing tegmen (white star) and enhancing tissue surrounding the ossicular chain (curved white arrow).D, Axial contrast-enhanced MR image of the tegmen tympani meningioma shows tumor enhancement in the middle ear cavity. Note the intact appearance of the ossicular chain (open white arrow), seen through the enhancement. B.E. Hamilton et al. AJNR Am J Neuroradiol 2006;27: ©2006 by American Society of Neuroradiology

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