CT findings of a middle ear mass.

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Presentation transcript:

CT findings of a middle ear mass. CT findings of a middle ear mass. A, Axial image shows the mass (short white arrow) extending over the cochlear promontory (long black arrow) and into the round window niche. B, The mass is invaginating along the long process of the incus (long white arrow) and neck of the malleus, with a portion sitting posteriorly on the pyramidal eminence (white arrowhead) between the sinus tympani and the facial nerve recess. C, Coronal imaging demonstrates the relationship of the mass (short white arrow) to the ossicles (long white arrow) and the cochlear promontory (long black arrow). E. Zan et al. AJNR Am J Neuroradiol 2009;30:1602-1603 ©2009 by American Society of Neuroradiology